A stock phrase in Japanese pop culture supposedly used by the wife in a newly-wed couple to invite her new husband to bed.

Kyūjitai form of 私生児 (“illegitimate child”)

decimal point, radix point

(dated) something that stands out among many other things / (figuratively) a single woman among many men

in kambun, a type of kaeriten in which the reading order is marked with numbers 1, 2, 3... indicating the order

astigmatism (defect of a lens)

break-even point

ditto mark (〃)

(typography) the iteration mark 〻, used to repeat kanji, historically mostly kanji with kun'yomi

(mathematics) A Japanese system of algebra for polynomial equations, adopted from 天(てん)元(げん)術(じゅつ) (tengenjutsu)