apertural

ap·er·ture

A0361900 (ăp′ər-chər)n.1. An opening, such as a hole, gap, or slit.2. a. A usually adjustable opening in an optical instrument, such as a camera or telescope, that limits the amount of light passing through a lens or onto a mirror.b. The diameter of such an opening, often expressed as an f-number.c. The diameter of the objective of a telescope.

[Middle English, from Latin apertūra, from apertus, past participle of aperīre, to open; see wer- in Indo-European roots.]

ap′er·tur′al adj.

apertural

(ˈæpəˌtjʊərəl; əˈpɜːtjərəl) adjrelating to aperture or an aperture

单词	apertural
释义	apertural ap·er·ture A0361900 (ăp′ər-chər)n.1. An opening, such as a hole, gap, or slit.2. a. A usually adjustable opening in an optical instrument, such as a camera or telescope, that limits the amount of light passing through a lens or onto a mirror.b. The diameter of such an opening, often expressed as an f-number.c. The diameter of the objective of a telescope. [Middle English, from Latin apertūra, from apertus, past participle of aperīre, to open; see wer- in Indo-European roots.] ap′er·tur′al adj. apertural (ˈæpəˌtjʊərəl; əˈpɜːtjərəl) adjrelating to aperture or an aperture EncyclopediaSeeaperture
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