gill slit

Noun
  1. One of a series of slit openings in the pharynxes of fishes and aquatic amphibians through which water passes (synset 102513738)
    is a type of: anatomical structure, bodily structure, body structure, complex body part, structure - a particular complex anatomical part of a living thing and its construction and arrangement
    same as: branchial cleft, gill cleft

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