perfect and without blemish; flawless

(number theory) perfect number, a positive integer that is equal to the sum of its positive divisors, excluding the number itself

aquaculture that spans an entire lifespan in complete captivity

(mathematics) panmagic square

(computing) character whose appearance may depend on a user's environment, or a character which may be absent from a user's environment, i.e. character set incompatibility

(computing) character whose appearance may depend on a user's environment, or a character which may be absent from a user's environment, i.e. character set incompatibility

alcoholism (chronic disease) (abbr. アル中)

Synonym of 黄昏 (tasogare, “dusk; twilight”) / Synonym of 黄昏時 (tasogaredoki, “dusk; twilight”)

perfectionist

(music) perfect fifth (interval between the first and second overtones or of seven semitones)