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Dictionary

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開口数

numerical aperture

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開口

opening; aperture; opening one's mouth; beginning to speak; open; broad

口数

number of words a person speaks; number of dependents; unit of an investment trust; unit; number of dependents; number of mouths to feed; number of shares; items; applications; etc; population; number of items; articles; etc

くちばかり 口ばかり くちばっかり

all talk

穿口ふたるい

hyperotreti; myxini

開口期

dilatation stage

Word Details

開口数

「かいこうすう」
noun
numerical aperture (in photography)
Mazii Dict