Ask Difference

Mouse vs. Rat — What's the Difference?

By Tayyaba Rehman — Updated on September 23, 2023
Mouse and Rat are both rodents but differ in size, with mice generally being smaller. Mice have a pointier nose and longer tail relative to body size, while rats have a blunter nose and thicker tail.
Mouse vs. Rat — What's the Difference?

Difference Between Mouse and Rat

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Key Differences

A mouse is a small rodent, commonly found in various environments. Rats, on the other hand, are larger rodents, also found in various environments but more commonly in urban areas.
Mice are often characterized by their pointier noses, large ears, and long, thin tails. Rats generally have blunter noses, smaller ears relative to their size, and thicker tails.
When it comes to behavior, mice are usually more curious and less cautious compared to rats. Rats tend to be more intelligent, cautious, and easier to train than mice.
Regarding reproduction, mice can have up to 10 litters a year with 5-6 offspring per litter. Rats have fewer litters, usually around 3-6 per year, but with more offspring, typically 7-8 per litter.
In terms of diet, both mice and rats are omnivores. However, rats have a more varied diet due to their larger size, allowing them to consume a wider range of food items compared to mice.
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Comparison Chart

Size

Smaller
Larger

Nose Shape

Pointier
Blunter

Tail

Longer, thinner
Shorter, thicker

Behavior

More curious, less cautious
More intelligent, cautious

Reproduction

Up to 10 litters/year, 5-6 offspring/litter
3-6 litters/year, 7-8 offspring/litter

Compare with Definitions

Mouse

A mouse, plural mice, is a small rodent. Characteristically, mice are known to have a pointed snout, small rounded ears, a body-length scaly tail, and a high breeding rate.

Rat

Rats are generally more intelligent than mice.
The lab rat quickly learned to navigate the maze.

Mouse

A small rodent that typically has a pointed snout, relatively large ears and eyes, and a long tail.

Rat

Rats are various medium-sized, long-tailed rodents. Species of rats are found throughout the order Rodentia, but stereotypical rats are found in the genus Rattus.

Mouse

A small handheld device which is moved across a mat or flat surface to move the cursor on a computer screen
The right mouse button
Copy the file with a click of the mouse

Rat

A rodent that resembles a large mouse, typically having a pointed snout and a long tail. Some kinds have become cosmopolitan and are sometimes responsible for transmitting diseases.

Mouse

A lump or bruise on or near the eye
She touched the mouse under her eye

Rat

A despicable person, especially a man who has been deceitful or disloyal
Her rat of a husband cheated on her

Mouse

(of a cat or owl) hunt for or catch mice
Female cats are usually much better at mousing than males

Rat

A person who is associated with or frequents a specified place
LA mall rats

Mouse

Use a mouse to move or position a cursor on a computer screen
Simply mouse over any item on the list

Rat

A pad used to give shape and fullness to a woman's hair.

Mouse

Any of numerous small rodents of the families Muridae and Cricetidae, such as the house mouse, characteristically having a pointed snout, small rounded ears, and a long naked or almost hairless tail.

Rat

Used to express mild annoyance or irritation.

Mouse

Any of various similar or related animals, such as the jumping mouse, the vole, or the jerboa.

Rat

Hunt or kill rats
Ratting is second nature to a Jack Russell

Mouse

A cowardly or timid person.

Rat

Desert one's party, side, or cause
Many of the clans rallied to his support, others ratted and joined the King's forces

Mouse

(Informal) A discolored swelling under the eye caused by a blow; a black eye.

Rat

Shape (hair) with a rat.

Mouse

Pl. mice or mous·es (mousĭz) Computers A handheld, button-activated input device that when rolled along a flat surface directs an indicator to move correspondingly about a computer screen, allowing the operator to move the indicator freely, as to select operations or manipulate text or graphics.

Rat

Any of various long-tailed rodents resembling mice but larger, especially one of the genus Rattus.

Mouse

To hunt mice.

Rat

Any of various animals similar to one of these long-tailed rodents.

Mouse

To search furtively for something; prowl.

Rat

A despicable person, especially one who betrays or informs upon associates.

Mouse

Any small rodent of the genus Mus.

Rat

A scab laborer.

Mouse

(informal) A member of the many small rodent and marsupial species resembling such a rodent.

Rat

A pad of material, typically hair, worn as part of a woman's coiffure to puff out her own hair.

Mouse

A quiet or shy person.

Rat

(Slang) A person who frequently passes time at a particular place. Often used in combination
A rink rat.

Mouse

(computing) (plural mice or, rarely, mouses) An input device that is moved over a pad or other flat surface to produce a corresponding movement of a pointer on a graphical display.

Rat

To hunt for or catch rats, especially with the aid of dogs.

Mouse

(computing) The cursor.

Rat

(Slang) To reveal incriminating or embarrassing information about someone, especially to a person in authority
Ratted on his best friend to the police.

Mouse

(boxing) A facial hematoma or black eye.

Rat

(Slang) To work as a scab laborer.

Mouse

(nautical) A turn or lashing of spun yarn or small stuff, or a metallic clasp or fastening, uniting the point and shank of a hook to prevent its unhooking or straightening out.

Rat

To puff out (the hair) with or as if with a pad of material.

Mouse

(obsolete) A familiar term of endearment.

Rat

(zoology) A medium-sized rodent belonging to the genus Rattus.

Mouse

A match used in firing guns or blasting.

Rat

(informal) Any of the numerous members of several rodent families (e.g. voles and mice) that resemble true rats in appearance, usually having a pointy snout, a long, bare tail, and body length greater than about 12 cm, or 5 inches.

Mouse

(set theory) A small model of (a fragment of) Zermelo-Fraenkel set theory with desirable properties (depending on the context).

Rat

(informal) A person who is known for betrayal; a scoundrel; a quisling.
Rat bastard
What a rat, leaving us stranded here!

Mouse

(historical) A small cushion for a woman's hair.

Rat

(informal) An informant or snitch.

Mouse

Part of a hind leg of beef, next to the round.

Rat

(informal) A scab: a worker who acts against trade union policies.

Mouse

(intransitive) To move cautiously or furtively, in the manner of a mouse (the rodent) (frequently used in the phrasal verb to mouse around).

Rat

(slang) A person who routinely spends time at a particular location.
Our teenager has become a mall rat.
He loved hockey and was a devoted rink rat.

Mouse

(intransitive) To hunt or catch mice (the rodents), usually of cats. 12

Rat

A wad of shed hair used as part of a hairstyle.

Mouse

To close the mouth of a hook by a careful binding of marline or wire.

Rat

A roll of material used to puff out the hair, which is turned over it.

Mouse

To navigate by means of a computer mouse.

Rat

Vagina.
Get your rat out.

Mouse

To tear, as a cat devours a mouse.

Rat

(regional) A scratch or a score.

Mouse

Any one of numerous species of small rodents belonging to the genus Mus and various related genera of the family Muridæ. The common house mouse (Mus musculus) is found in nearly all countries. The American white-footed mouse, or deer mouse (Peromyscus leucopus, formerly Hesperomys leucopus) sometimes lives in houses. See Dormouse, Meadow mouse, under Meadow, and Harvest mouse, under Harvest.

Rat

A place in the sea with rapid currents and crags where a ship is likely to be torn apart in stormy weather.

Mouse

A knob made on a rope with spun yarn or parceling to prevent a running eye from slipping.

Rat

(usually with “on” or “out”) To betray a person or party, especially by telling their secret to an authority or an enemy; to turn someone in.
He ratted on his coworker.
He is going to rat us out!

Mouse

A familiar term of endearment.

Rat

To work as a scab, going against trade union policies.

Mouse

A dark-colored swelling caused by a blow.

Rat

(of a dog, etc.) To kill rats.

Mouse

A match used in firing guns or blasting.

Rat

(regional) To scratch or score.
He ratted a vertical line on his face with a pocket knife.

Mouse

To watch for and catch mice.

Rat

To tear, rip, rend.
Ratted to shreds.

Mouse

To watch for or pursue anything in a sly manner; to pry about, on the lookout for something.

Rat

Damn, drat, blast; used in oaths.

Mouse

To tear, as a cat devours a mouse.

Rat

One of several species of small rodents of the genus Rattus (formerly included in Mus) and allied genera, of the family Muridae, distinguished from mice primarily by being larger. They infest houses, stores, and ships, especially the Norway rat, also called brown rat, (Rattus norvegicus formerly Mus decumanus), the black rat (Rattus rattus formerly Mus rattus), and the roof rat (formerly Mus Alexandrinus, now included in Rattus rattus). These were introduced into America from the Old World. The white rat used most commonly in laboratories is primarily a strain derived from Rattus rattus.

Mouse

Any of numerous small rodents typically resembling diminutive rats having pointed snouts and small ears on elongated bodies with slender usually hairless tails

Rat

A round and tapering mass of hair, or similar material, used by women to support the puffs and rolls of their natural hair.

Mouse

A hand-operated electronic device that controls the coordinates of a cursor on your computer screen as you move it around on a pad; on the bottom of the mouse is a ball that rolls on the surface of the pad;
A mouse takes much more room than a trackball

Rat

One who deserts his party or associates; hence, in the trades, one who works for lower wages than those prescribed by a trades union.

Mouse

To go stealthily or furtively;
..stead of sneaking around spying on the neighbor's house

Rat

In English politics, to desert one's party from interested motives; to forsake one's associates for one's own advantage; in the trades, to work for less wages, or on other conditions, than those established by a trades union.
Coleridge . . . incurred the reproach of having ratted, solely by his inability to follow the friends of his early days.

Mouse

Manipulate the mouse of a computer

Rat

To catch or kill rats.

Mouse

Mouse is a small rodent with a pointy nose.
The mouse scurried across the kitchen floor.

Rat

To be an informer (against an associate); to inform (on an associate); to squeal; - used commonly in the phrase to rat on.

Mouse

Mice have long, thin tails.
The mouse's tail twitched nervously.

Rat

Any of various long-tailed rodents similar to but larger than a mouse

Mouse

Mice are generally more curious than rats.
The mouse explored the new maze eagerly.

Rat

Someone who works (or provides workers) during a strike

Mouse

Mice can reproduce rapidly.
In a year, a single pair of mice can produce up to 10 litters.

Rat

A person who is deemed to be despicable or contemptible;
Only a rotter would do that
Kill the rat
Throw the bum out
You cowardly little pukes!
The British call a contemptible person a `git'

Mouse

Mice are commonly found in various environments.
We found a mouse nest in the attic.

Rat

One who reveals confidential information in return for money

Rat

A pad (usually made of hair) worn as part of a woman's coiffure

Rat

Desert one's party or group of friends, for example, for one's personal advantage

Rat

Employ scabs or strike breakers in

Rat

Take the place of work of someone on strike

Rat

Give (hair) the appearance of being fuller by using a rat

Rat

Catch rats, especially with dogs

Rat

Give away information about somebody;
He told on his classmate who had cheated on the exam

Rat

Rat is a larger rodent with a blunt nose.
The rat rummaged through the garbage.

Rat

Rats have thicker tails.
The rat's tail dragged behind it as it ran.

Rat

Rats have a more varied diet.
The rat ate everything from fruits to small insects.

Rat

Rats are more commonly found in urban areas.
Rats are a common problem in city sewers.

Common Curiosities

Do mice and rats have different nose shapes?

Yes, mice have pointier noses, while rats have blunter noses.

What is the general size difference between a mouse and a rat?

Mice are generally smaller than rats.

What's the common diet for a rat?

Rats have a varied diet, including fruits, grains, and small insects.

Are mice more cautious than rats?

No, mice are generally less cautious than rats.

Do mice and rats belong to the same family?

Yes, both are rodents but from different genera.

Are mice nocturnal?

Yes, mice are generally nocturnal creatures.

How many litters can a mouse have in a year?

A mouse can have up to 10 litters a year.

What is the average lifespan of a mouse?

The average lifespan of a mouse is around 1-3 years.

How many offspring can a rat have per litter?

A rat can have 7-8 offspring per litter.

Which is easier to train, a mouse or a rat?

Rats are generally easier to train due to their higher intelligence.

Are rats more commonly found in urban or rural areas?

Rats are more commonly found in urban areas.

What is the average lifespan of a rat?

The average lifespan of a rat is around 2-3 years.

Are mice or rats more likely to carry diseases?

Both can carry diseases, but rats are more commonly associated with spreading illnesses.

Are rats nocturnal?

Yes, rats are generally nocturnal as well.

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Author Spotlight

Written by
Tayyaba Rehman
Tayyaba Rehman is a distinguished writer, currently serving as a primary contributor to askdifference.com. As a researcher in semantics and etymology, Tayyaba's passion for the complexity of languages and their distinctions has found a perfect home on the platform. Tayyaba delves into the intricacies of language, distinguishing between commonly confused words and phrases, thereby providing clarity for readers worldwide.

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