prolegs

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prolegs (false legs) Unjointed, fleshy protuberances found on the abdomen of certain insect larvae, in contrast with true legs, which are jointed and found on the thorax. In Lepidoptera, prolegs, which usually bear sclerotized hooks called ‘crochets’, are usually found on segments 3–6 and 10, but some or all may be absent.