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Inner margin of the aperture of a shell.

The external margin of the aperture of a shell. See Univalve.

The entrance or escape of a fluid through a crack, fissure, or other aperture; as, the leak gained on the ship's pumps. To spring a leak, to open or crack so as to let in water; to begin to let in water; as, the ship sprung a leak.

One of the edges of the aperture of a univalve shell. Lip bit, a pod auger. See Auger. -- Lip comfort, comfort that is given with words only. -- Lip comforter, one who comforts with words only. -- Lip labor, unfelt or insincere speech; hypocrisy. Bale. -- Lip reading, the catching of the words or meaning of one spe…

A hole or aperture that gives a passage, or the means of escape or evasion.

discharging missiles or pouring burning or melted substances upon assailants through such apertures.

Any spiral marine shell of the genus Persona, having a curiously twisted aperture.

One of a group of univalve shells, having a large aperture or mouth.

The opening through which an animal receives food; the aperture between the jaws or between the lips; also, the cavity, containing the tongue and teeth, between the lips and the pharynx; the buccal cavity.

ntals. -- Nasal index (Anat.), in the skull, the ratio of the transverse the base of the aperture to the nasion, which latter distance is taken as the standard, equal to 100.

A place which is open; a breach; an aperture; a gap; cleft, or hole. We saw him at the opening of his tent. Shak.

The lid closing the aperture of various species of shells, as the common whelk. See Illust. of Gastropoda.

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. Shak. Etna was bored through the top with a monstrous orifice. Addison.

One of the excurrent apertures of sponges.

An opening or aperture; a recess; a recess; a chamber. [Obs.] Spenser. "The cave's inmost overture." Chapman.

A hole made by boring or piercing; an aperture. "Slender perforations." Sir T. Browne.

The lip, or edge of the aperture, of a spiral shell.

The edge of the aperture of a univalve shell.

Open; evident; apert. [Obs.] Piers Plowman.

To pass or flow through, as an aperture, pore, or interstice; to permeate. That labyrinth is easily pervaded. Blackstone.