Kumi logo
    Kumi

    Learn Japanese. Where understanding folds into fluency.

    Dictionary

    KanjiKanji vocabularyKana vocabularyKanaRadicalsGrammarJLPT N5

    Learn

    GuidesStart where you areWhat is KMT?RoadmapFAQ

    Connect

    EmailDiscordInstagramThreadsTikTokYouTubeLinkedInBlueskyX

    Newsletter

    Start learning free →

    Free forever tier. No card required.

    © 2026 Kumiai Inc. All rights reserved.

    AboutFAQContactStatusPrivacyTermsAttributions
    Dictionary
    1. Dictionary
    2. Kanji Vocab
    3. 瞳孔括約筋

    瞳孔括約筋

    瞳どう孔こう括かつ約やく筋きん

    sphincter muscle of the pupil

    NTNounMedicine & HealthKanji Vocab51 strokes

    どうこうかつやくきん

    Noun

    1.
    sphincter muscle of the pupil, sphincter pupillae
    anatomy

    Stroke 0 / 51

    Speed1.0x

    Kanji that make up this word

    瞳
    ひとみ…(3)
    pupil (of eye)
    孔
    あな…(3)
    cavity・hole・slit・very・great…(1)
    括
    くく.る…(1)
    fasten・tie up・arrest・constrict
    約
    つづ.まる・つづ.める・つづま.やか…(1)
    promise・approximately・shrink
    筋
    すじ…(1)
    muscle・sinew・tendon・fiber・plot…(2)
    Kumi logo

    Track your mastery

    Kumi's KMT system tracks your mastery across kanji, vocabulary, grammar, and reading. Create a free account to use it on 220,000+ concepts.

    Related concepts for this entry

    Used in vocabulary

    • 瞳
    • 孔
    • 括
    • 約
    • 筋

    Explore more

    Kanji Vocab dictionary›Browse all entries›