From ZooTerms (Dictionary of Invertebrate Zoology)
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crura (noun, plural; singular crus; Latin crus, leg): 1. Any leg-like part.

2. (Brachiopoda) A pair of prongs (brachidium) extending from the cardinalia or septum to support the lophophore.

3. (Mollusca) A stalk or peduncle.

4. (NEMATA) Lateral extensions of the cuneus of the gubernaculum.

5. (Platyhelminthes: Turbellaria) Branches of the intestine of a flatworm.