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Thesaurus: tracheal gill

One of the external filaments or leaflike plates connected with the tracheae of the inside of the body that form part of the respiratory system of some aquatic insect larvae and nymphs but rarely persist in the adult.

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  1. n. One of the external filaments or leaflike plates connected with the tracheae of the inside of the body that form part of the respiratory system of some aquatic insect larvae and nymphs but rarely persist in the adult.