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The Collaborative International Dictionary
Peraeopod

Peraeopod \Pe*r[ae]"o*pod\, n. [Gr. ? on the opposite side + -pod.] (Zo["o]l.) One of the thoracic legs of a crustacean. See Illust. of Crustacea.

Wiktionary
peraeopod

n. (context zoology English) One of the thoracic legs of a crustacean.