Meaning of aperture | Babel Free

Definitions

1. A small or narrow opening, gap, slit, or hole.
2. opening (act of making something open)
3. A hole which restricts the diameter of the lightpath through one plane in an optical system.
4. aperture (something which restricts the diameter of a light path)
5. 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.
6. opening (the first few moves)
7. 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.
8. opening ceremony
9. The maximum angle between the two generatrices.
   rare
10. openness, open-mindedness

Equivalents

Examples

“an aperture in a wall”

“Were the larynx of the little creature like that of the parent, the milk might—probably would—enter the windpipe and cause suffocation : but the fœtal larynx is cone-shaped, with the opening at the apex, which projects, as in the whale-tribe, into the back aperture of the nostrils, where it is closely embraced by muscles of the ‘soft palate.’”

“In the centre of the fleshy membrane is an aperture leading into a deep cavity, at the bottom of which is placed a prominent piston that may be retracted by muscular fibres provided for the purpose.”

“The door was opened — ‘on the chain.’ The old lady peered at us through an aperture of about six inches.”

“This telescope has a 100 cm aperture.”

“If the generatrix makes an angle θ to the axis, then the aperture is 2θ.”

CEFR level