1. aperture(n = noun.artifact) - a device that controls amount of light admitted;
is a kind of regulator
is a part of camera, photographic camera, scope, telescope
2. aperture(n = noun.object) - a natural opening in something;
is a kind of hole
is a part of eye, oculus, optic
has particulars: pupil, micropyle, pore, stoma, stomate
3. aperture(n = noun.artifact) - an man-made opening; usually small;
is a kind of opening
has particulars: embouchure, mouthpiece, mouthpiece
1. The act of opening. [1913 Webster]
2. An opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; as, an aperture in a wall. [1913 Webster]
"An aperture between the mountains." [1913 Webster]
"The back aperture of the nostrils." [1913 Webster]
3. The diameter of the exposed part of the object glass of a telescope or other optical instrument; as, a telescope of four-inch aperture. [1913 Webster]
" The aperture of microscopes is often expressed in degrees, called also the angular aperture, which signifies the angular breadth of the pencil of light which the instrument transmits from the object or point viewed; as, a microscope of 100
aperture, n.
1 an opening; a gap.
2 a space through which light passes in an optical or photographic instrument, esp. a variable space in a camera.
Etymology:
L apertura (as APERITIF)
N opening, hole, foramen, puncture, perforation, fontanel, transforation, pinhole, keyhole, loophole, porthole, peephole, mousehole, pigeonhole, eye of a needle, eyelet, slot, opening, aperture, apertness, hiation, yawning, oscitancy, dehiscence, patefaction, pandiculation, chasm, embrasure, window, casement, abatjour, light, sky light, fan light, lattice, bay window, bow window, oriel, dormer, lantern, outlet, inlet, vent, vomitory, embouchure, orifice, mouth, sucker, muzzle, throat, gullet, weasand, wizen, nozzle, placket, portal, porch, gate, ostiary, postern, wicket, trapdoor, hatch, door, arcade, cellarway, driveway, gateway, doorway, hatchway, gangway, lich gate, way, path, thoroughfare, channel, passage, passageway, tube, pipe, water pipe, air pipe, vessel, tubule, canal, gut, fistula, adjutage, ajutage, ostium, smokestack, chimney, flue, tap, funnel, gully, tunnel, main, mine, pit, adit, shaft, gallery, alley, aisle, glade, vista, bore, caliber, pore, blind orifice, fulgurite, thundertube, porousness, porosity, sieve, cullender, colander, cribble, riddle, screen, honeycomb, apertion, perforation, piercing, terebration, empalement, pertusion, puncture, acupuncture, penetration, key, opener, master key, password, combination, passe- partout, open, perforated, perforate, wide open, ajar, unclosed, unstopped, oscitant, gaping, yawning, patent, tubular, cannular, fistulous, pervious, permeable, foraminous, vesicular, vasicular, porous, follicular, cribriform, honeycombed, infundibular, riddled, tubulous, tubulated, piped, tubate, opening, aperient, Int, open sesame!.