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aperture
(redirected from Aperature)

   Also found in: Encyclopedia, Wikipedia, Hutchinson 0.06 sec.
aperture /ap·er·ture/ (ap´er-cher) opening.
piriform aperture  the anterior end of the bony nasal opening, connecting the external nose with the skull.

ap·er·ture (pr-chr)
n.
1. An opening, such as a hole, gap, or slit.
2. A usually adjustable opening in an optical instrument, such as a microscope, a camera, or a telescope, that limits the amount of light passing through a lens or onto a mirror.
3. The diameter of such an opening.
4. The diameter of the objective of a telescope or microscope.

aper·tural adj.

aperture,
n an opening such as in bone.

aperture
an opening.

nasal aperture
the opening on the skull bounded by the nasal and incisive bones.
nasomaxillary aperture
the connecting aperture between the middle nasal meatus and the maxillary sinuses.
numerical aperture
measure of efficiency of a microscope objective proportional to the square root of the amount of light entering the instrument.


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On the back side of the equipment rack, a conveyor belt driven by a stepper motor was used to deliver marbles to a feeder tube connected to the reinforcement aperature (clown's mouth).
The ProPak-LBplus is powered by NovAtel's OEM4-G2 receiver - a small, high performance, dual frequency GPS engine featuring patented Pulse Aperature Correlator (PAC) multipath reduction technology.
Among the mission systems displayed on the EADS North America AAAA exhibit are the HELLAS obstacle avoidance and cable warning system for helicopters, the MiSAR miniature all-weather synthetic aperature radar for helicopters and tactical unmanned aerial vehicles, and the Mini-FLITS (minimized front-line integrated test system) from Racal Instruments, a Test and Services business unit of EADS North America Defense.
 
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