LOCKET

locket. Locket, n. an ornamental lock, a catch or spring

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Lock″et (?), n. [[F. loquet latch, dim. of OF. loc latch, lock; of German origin. See Lock a fastening.]] 1. 1. A small lock; a catch or spring to fasten a necklace or other ornament.
2. 2. A little case for holding a miniature or lock of hair, usually suspended from a necklace or watch chain.