armhook

The English word “armhook” has 3 meanings listed here.

noun

A hook-like projection on the arm of a cephalopod, such as on the armhook squid (Gonatus fabricii).
A movement in which two people hook arms at the elbow and turn around each other.
A hook for maneuvering something using the arm.

From arm + hook.

Keep exploring: in the interactive dictionary every word of a definition is a link. Open “armhook” there

The English dictionary on Glottosphere has 650,529 entries with a page. Browse the English dictionary.

Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.