Meaning of APERTURE in English

transcription, транскрипция: [ ˈap-ə(r)-ˌchu̇r, -chər, -ˌtyu̇r, -ˌtu̇r ]


Etymology: Middle English, from Latin apertura, from apertus, past participle of aperire to open

Date: 15th century

1. : an opening or open space : hole


a. : the opening in a photographic lens that admits the light

b. : the diameter of the stop in an optical system that determines the diameter of the bundle of rays traversing the instrument

c. : the diameter of the objective lens or mirror of a telescope

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.