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The propodite of a crustacean limb, especially in a claw-bearing limb, where it forms the base of the claw and the fixed side of the pincer against which the mobile part (dactylus) closes.
Mid 19th century; earliest use found in American Naturalist. From pro- + ancient Greek ποδ-, πούς foot + -us, after Latin masculine nouns ending in -us.