carpus
From ZooTerms (Dictionary of Invertebrate Zoology)
carpus (noun; plural carpi; Latin carpus, Greek wrist): 1. The wrist.
2. (Arthropoda: Crustacea) The antepenultimate segment of the thoracopod or pereopod; the carpopod(ite).
3. (Arthropoda: Insecta) The area of the wing at which they transversely fold; the pterostigma of Odonata; the radius and cubitus extremity of the fore wing.
4. (Mollusca: Cephalopoda) The tentacle.
