CHIN

chin. Chin, n. the lowest part or end of the human face

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Chin (chĭn), n. [[AS. cin, akin to OS. kin, G kinn, Icel. kinn, cheek, Dan. & Sw. kind, L. gena, Gr. �; cf. Skr. hanu. √232.]] 1. 1. The lower extremity of the face below the mouth; the point of the under jaw.
2. 2. (Zoöl.) The exterior or under surface embraced between the branches of the lower jaw bone, in birds.