HyperDic: external_gill

English > 1 sense of the expression external gill:
NOUNanimalexternal gilloccurs in some mollusks and in tadpoles and other immature amphibians
English > external gill: 1 sense > noun 1, animal
MeaningOccurs in some mollusks and in tadpoles and other immature amphibians.
Broadergill, branchiarespiratory organ of aquatic animals that breathe oxygen dissolved in water

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