aperture

名词 n.
中文释义
英 /ˈap.ə.t͡ʃə/|/ˈap.ə.tjʊə/    美 /ˈæp.ɚˌt͡ʃʊɹ/|/ˈæp.ɚ.t͡ʃɚ/|/ˈæp.ɚˌtjʊɹ/|/ˈæp.ɚˌtʊɹ/

英文释义

名词 n.
  1. A small or narrow opening, gap, slit, or hole.
    — an aperture in a wall
  2. A hole which restricts the diameter of the lightpath through one plane in an optical system.
  3. A hole which restricts the diameter of the lightpath through one plane in an optical system.; 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.
    — This telescope has a 100 cm aperture.
  4. 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.
  5. The maximum angle between the two generatrices. rare
    — If the generatrix makes an angle θ to the axis, then the aperture is 2θ.

词形变化

apertures plural

词汇关系

衍生词
apertometer apertural aperturate apertured apertureless aperture membrane aperture priority aperture-priority ectoaperture endoaperture macroaperture multiaperture nanoaperture pyriform aperture subaperture
相关词
aperient apéritif aperitive apert apertion apertly

词源

From late Middle English, from Latin apertūra (“an opening”), from aperiō (“to uncover, make or lay bare”) + -tūra (“-ure”, action noun suffix). Doublet of overture and apertura.
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