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The Collaborative International Dictionary

Proleg \Pro"leg\, n. [Pref. pro- for, in place of + leg.] (Zo["o]l.) One of the fleshy legs found on the abdominal segments of the larv[ae] of Lepidoptera, sawflies, and some other insects. Those of Lepidoptera have a circle of hooks. Called also proped, propleg, and falseleg.