Chalk vs. Lime — What's the Difference?

Chalk is a soft, white, porous, sedimentary carbonate rock, a form of limestone composed of the mineral calcite and originally formed deep under the sea by the compression of microscopic plankton which had fallen to the sea floor. Chalk is common throughout Western Europe, where deposits underlie parts of France, and steep cliffs are often seen where they meet the sea in places such as the Dover cliffs on the Kent coast of the English Channel.

A white caustic alkaline substance consisting of calcium oxide, which is obtained by heating limestone and which combines with water with the production of much heat; quicklime.

A white soft earthy limestone (calcium carbonate) formed from the skeletal remains of sea creatures.

Birdlime.

Short for French chalk

A rounded citrus fruit similar to a lemon but greener, smaller, and with a distinctive acid flavour

Write or draw with chalk

The evergreen citrus tree which produces limes, widely cultivated in warm climates.

Charge (drinks bought in a pub or bar) to a person's account

A bright light green colour like that of a lime

A soft compact calcite, CaCO3, with varying amounts of silica, quartz, feldspar, or other mineral impurities, generally gray-white or yellow-white and derived chiefly from fossil seashells.

A deciduous tree with heart-shaped leaves and fragrant yellowish blossom, native to north temperate regions. The pale timber is used for carving and inexpensive furniture.

A piece of chalk or chalklike substance in crayon form, used for marking on a blackboard or other surface.

An informal social gathering characterized by semi-ritualized talking.

(Games) A small cube of chalk used in rubbing the tip of a billiard or pool cue to increase its friction with the cue ball.

Treat (soil or water) with lime to reduce acidity and improve fertility or oxygen levels

A mark made with chalk.

Catch (a bird) with birdlime

Chiefly British A score or tally.

Sit or stand around talking with others

To mark, draw, or write with chalk

Any of several evergreen trees or shrubs of the genus Citrus having edible green or greenish-yellow fruit, especially the Mexican lime and the Persian lime.

To rub or cover with chalk, as the tip of a billiard cue.

The fruit of any of these plants, having a pulpy interior and usually acid juice.

To make pale; whiten.

See linden.

To treat (soil, for example) with chalk.

See calcium oxide.

(uncountable) A soft, white, powdery limestone (calcium carbonate, CaCO3).

Any of various mineral and industrial forms of calcium oxide differing chiefly in water content and percentage of constituents such as magnesia, silica, alumina, and iron.

(countable) A piece of chalk, or nowadays processed compressed gypsum (calcium sulfate, CaSO4), that is used for drawing and for writing on a blackboard (chalkboard).

Birdlime.

Tailor's chalk.

To treat with lime.

A white powdery substance used to prevent hands slipping from holds when climbing, or losing grip in weight-lifting or gymnastics, sometimes but not always limestone-chalk, often magnesium carbonate (MgCO3).

To smear with birdlime.

A platoon-sized group of airborne soldiers.

To catch or snare with or as if with birdlime.

The favorite in a sporting event.

(chemistry) Any inorganic material containing calcium, usually calcium oxide (quicklime) or calcium hydroxide (slaked lime).

The prediction that there will be no upsets, and the favored competitor will win.

(poetic) Any gluey or adhesive substance; something which traps or captures someone; sometimes a synonym for birdlime.

To apply chalk to anything, such as the tip of a billiard cue.

(theatre) A spotlight.

To record something, as on a blackboard, using chalk.

A deciduous tree of the genus Tilia, especially Tilia × europaea; the linden tree.

To use powdered chalk to mark the lines on a playing field.

The wood of this tree.

(figuratively) To record a score or event, as if on a chalkboard.

Any of several green citrus fruit, somewhat smaller and sharper-tasting than a lemon.

To manure (land) with chalk.

Any of the trees that bear limes, especially Key lime, Citrus aurantiifolia.

To make white, as if with chalk; to make pale; to bleach.

(uncountable) A brilliant, sometimes yellowish, green colour associated with the fruits of a lime tree.

A soft, earthy substance, of a white, grayish, or yellowish white color, consisting of calcium carbonate, and having the same composition as common limestone.

(fandom) A fan fiction story which contains sexual references, but stops short of full, explicit descriptions of sexual activity (coined by analogy with lemon).

Finely prepared chalk, used as a drawing implement; also, by extension, a compound, as of clay and black lead, or the like, used in the same manner. See Crayon.

A casual gathering to socialize.

To rub or mark with chalk.

(transitive) To treat with calcium hydroxide or calcium oxide (lime).

To manure with chalk, as land.

(transitive) To smear with birdlime.

To make white, as with chalk; to make pale; to bleach.

(rare) To ensnare, catch, entrap.

A soft whitish calcite

(transitive) To apply limewash.

A pure flat white with little reflectance

To hang out/socialize in an informal, relaxed environment, especially with friends, for example at a party or on the beach.

Amphetamine used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant

Containing lime or lime juice.

A piece of chalk (or similar substance) used for writing on blackboards or other surfaces

Having the aroma or flavor of lime.

Write, draw, or trace with chalk

Lime-green.

A thong by which a dog is led; a leash.

The linden tree. See Linden.

The fruit of the Citrus aurantifolia, allied to the lemon, but greener in color; also, the tree which bears it.

The color of the lime{1}, a yellowish-green.

Birdlime.

Oxide of calcium, CaO; the white or gray, caustic substance, usually called quicklime, obtained by calcining limestone or shells, the heat driving off carbon dioxide and leaving lime. It develops great heat when treated with water, forming slaked lime, and is an essential ingredient of cement, plastering, mortar, etc.

To smear with a viscous substance, as birdlime.

To entangle; to insnare.

To treat with lime, or oxide or hydrate of calcium; to manure with lime; as, to lime hides for removing the hair; to lime sails in order to whiten them; to lime the lawn to decrease acidity of the soil.

To cement.

Having a yellowish-green color like that of the lime (the fruit).

A caustic substance produced by heating limestone

A white crystalline oxide used in the production of calcium hydroxide

A sticky adhesive that is smeared on small branches to capture small birds

Any of various related trees bearing limes

Any of various deciduous trees of the genus Tilia with heart-shaped leaves and drooping cymose clusters of yellowish often fragrant flowers; several yield valuable timber

The green acidic fruit of any of various lime trees

Spread birdlime on branches to catch birds

Cover with lime so as to induce growth;