瞳孔|どうこうdoukou[0]heiban (flat)

1. noun, anatomypupil (of the eye)

• Synonym瞳ひとみNeutralLiterary word for the pupil that can also mean the eyes, as in 「澄んだ瞳」; 「瞳孔」 refers strictly to the hole in the iris, in both medical and everyday use.
• Synonym眸子ぼうしWrittenWritten Sino-Japanese word for the eyeball or pupil, used very rarely; 「瞳」 is the usual word.
• Related瞳子どうしWrittenWritten word for the pupil, seen very rarely; in medical contexts 「瞳孔」 is the term used.

For the hole in the centre of the iris, use 「瞳孔」, as in 「瞳孔が開く」. When speaking of the eyes or the look in them in a literary way, use 「瞳」, as in 「つぶらな瞳」. 「眸子」 and 「瞳子」 are rare written words.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 眼球がんきゅうの虹彩こうさいの中央ちゅうおうにある、光ひかりが入はいってくる円型えんけいの小ちいさい穴あな。