The Collaborative International Dictionary
Mousing hook
Mousing \Mous"ing\, n.
The act of hunting mice.
(Naut.) A turn or lashing of spun yarn or small stuff, or a metallic clasp or fastening, uniting the point and shank of a hook to prevent its unhooking or straighening out.
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A ratchet movement in a loom.
Mousing hook, a hook with an attachment which prevents its unhooking.
Wiktionary
mousing hook
n. A hook with an attachment which prevents its unhooking.