Aperture vs. Vent

In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture and focal length of an optical system determine the cone angle of a bundle of rays that come to a focus in the image plane.

Forceful expression or release of pent-up thoughts or feelings

An opening, such as a hole, gap, or slit.

An opening permitting the escape of fumes, a liquid, a gas, or steam.

A usually adjustable opening in an optical instrument, such as a camera or telescope, that limits the amount of light passing through a lens or onto a mirror.

The small hole at the breech of a gun through which the charge is ignited.

The diameter of such an opening, often expressed as an f-number.

(Zoology) The excretory opening of the digestive tract in animals such as birds, reptiles, amphibians, and fish.

The diameter of the objective of a telescope.

The opening of a volcano in the earth's crust.

A small or narrow opening, gap, slit, or hole.

An opening on the ocean floor that emits hot water and dissolved minerals.

(optics) A hole which restricts the diameter of the lightpath through one plane in an optical system.

A slit in a garment, as in the back seam of a jacket.

The diameter of such a hole which restricts the width of the lightpath through the whole system. For a telescope, this is the diameter of the objective lens.

To express (one's thoughts or feelings, for example), especially forcefully.

The (typically) large-diameter antenna used for receiving and transmitting radio frequency energy containing the data used in communication satellites, especially in the geostationary belt. For a comsat, this is typically a large reflective dish antenna; sometimes called an array.

To release or discharge (steam, for example) through an opening.

The maximum angle between the two generatrices.

To provide with a vent.

The act of opening.

To vent one's feelings or opinions

An opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; as, an aperture in a wall.

To be released or discharged through an opening.

The diameter of the exposed part of the object glass of a telescope or other optical instrument; as, a telescope of four-inch aperture.

To rise to the surface of water to breathe. Used of a marine mammal.

a device that controls amount of light admitted

An opening through which gases, especially air, can pass.

a natural opening in something

A small aperture.

an man-made opening; usually small

An opening in a volcano from which lava or gas flows.

A rant; a long session of expressing verbal frustration.

The excretory opening of lower orders of vertebrates.

A slit in the seam of a garment.

The opening at the breech of a firearm, through which fire is communicated to the powder of the charge.

In steam boilers, a sectional area of the passage for gases divided by the length of the same passage in feet.

Opportunity of escape or passage from confinement or privacy; outlet.

Emission; escape; passage to notice or expression; publication; utterance.

Ventriloquism.

(obsolete) A baiting place; an inn.

clipping of ventilationor ventilator.

(intransitive) To allow gases to escape.

(transitive) To allow to escape through a vent.

To express a strong emotion.

To snuff; to breathe or puff out; to snort.

(transitive) To determine the sex of (a chick) by opening up the anal vent or cloaca.

To sell; to vend.

To ventilate; to use a ventilator; to use ventilation.

Sale; opportunity to sell; market.

A baiting place; an inn.

A small aperture; a hole or passage for air or any fluid to escape; as, the vent of a cask; the vent of a mold; a volcanic vent.

The anal opening of certain invertebrates and fishes; also, the external cloacal opening of reptiles, birds, amphibians, and many fishes.

The opening at the breech of a firearm, through which fire is communicated to the powder of the charge; touchhole.

Fig.: Opportunity of escape or passage from confinement or privacy; outlet.

Sectional area of the passage for gases divided by the length of the same passage in feet.

Emission; escape; passage to notice or expression; publication; utterance.

To sell; to vend.

To snuff; to breathe or puff out; to snort.

To let out at a vent, or small aperture; to give passage or outlet to.

To suffer to escape from confinement; to let out; to utter; to pour forth; as, to vent passion or complaint.

To utter; to report; to publish.

To scent, as a hound.

To furnish with a vent; to make a vent in; as, to vent. a mold.

a hole for the escape of gas or air

external opening of urinary or genital system of a lower vertebrate

a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt

a slit in a garment (as in the back seam of a jacket)

activity that releases or expresses creative energy or emotion;

give expression or utterance to;

expose to cool or cold air so as to cool or freshen;