Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of aperture is as below...

Lip :: Lip (n.) One of the edges of the aperture of a univalve shell.

Mask Shell :: Mask shell () Any spiral marine shell of the genus Persona, having a curiously twisted aperture..

Pupil :: Pupil (n.) The aperture in the iris; the sight, apple, or black of the eye. See the Note under Eye, and Iris..

Peristome :: Peristome (n.) The lip, or edge of the aperture, of a spiral shell..

Emissary :: Emissary (a.) Applied to the veins which pass out of the cranium through apertures in its walls.

Valve :: Valve (n.) A lid, plug, or cover, applied to an aperture so that by its movement, as by swinging, lifting and falling, sliding, turning, or the like, it will open or close the aperture to permit or prevent passage, as of a fluid..

Orifice :: Orifice (n.) A mouth or aperture, as of a tube, pipe, etc.; an opening; as, the orifice of an artery or vein; the orifice of a wound..

Fauces :: Fauces (n.pl.) That portion of the interior of a spiral shell which can be seen by looking into the aperture.

Ascidioidea :: Ascidioidea (n. pl.) A group of Tunicata, often shaped like a two-necked bottle. The group includes, social, and compound species. The gill is a netlike structure within the oral aperture. The integument is usually leathery in texture. See Illustration in Appendix..

Leak :: Leak (v.) The entrance or escape of a fluid through a crack, fissure, or other aperture; as, the leak gained on the ship's pumps..

Barker''s Mill :: Barker's mill () A machine, invented in the 17th century, worked by a form of reaction wheel. The water flows into a vertical tube and gushes from apertures in hollow horizontal arms, causing the machine to revolve on its axis..

Holostomatous :: Holostomatous (a.) Having an entire aperture; -- said of many univalve shells.

Aprocta :: Aprocta (n. pl.) A group of Turbellaria in which there is no anal aperture.

Pseudostoma :: Pseudostoma (n.) A group of cells resembling a stoma, but without any true aperture among them..

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

Cyclostoma :: Cyclostoma (n. pl.) A division of Bryozoa, in which the cells have circular apertures..

Slide :: Slide (n.) A cover which opens or closes an aperture by sliding over it.

Swallowed :: Swallow (n.) The aperture in a block through which the rope reeves.

Flashing :: Flashing (n.) The reheating of an article at the furnace aperture during manufacture to restore its plastic condition; esp., the reheating of a globe of crown glass to allow it to assume a flat shape as it is rotated..

Embrasure :: Embrasure (n.) An aperture with slant sides in a wall or parapet, through which cannon are pointed and discharged; a crenelle. See Illust. of Casemate..

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