Word

開口数

かいこうすう
numerical aperture (in photography)
Word

マーク区間開始

マークくかんかいし
marked section start
Word

開口音

かいこうおん
(of Chinese) pronunciation of kanji without a medial between the initial consonant and center vowel; (of Japanese) the long "o" vowel arising from combination of the "a" and "u" sounds
Word

開口一番

かいこういちばん
at the very beginning of one's speech; the first thing (one) says after opening the mouth
Word

開悟

かいご
wisdom; enlightenment
Word

プール開き

プールびらき
opening of a pool (e.g. for the summer season)
Word

ヘッディング開始

ヘッディングかいし
start of heading; start of header; SOH
Word

開経偈

かいきょうげ
opening chant of a sutra
Word

開経

かいきょう
prefatory sutra; opening a sutra; beginning to read a sutra
Word

開襟シャツ

かいきんシャツ
open-collared shirt