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かいこうすう
Meanings
Noun
1. numerical aperture (in photography)
Alt. forms
開かい口こう数すう
かいこうすう
Pitch accent
か
いこ
うすう
Composed of
open; beginning
population; number of items, articles, etc.
Composed of
opening; aperture (e.g. camera); opening one's mouth; beginning to speak; open; broad
several; a few; number; quantity; counting; calculation; number