What is (a) A projecting member resembling a tenon, but fitting into a mortise that is only sunk, not pierced through. (b) One of several steps, or offsets, in a tusk. See Tusk called?

tooth — (a) A projecting member resembling a tenon, but fitting into a mortise that is only sunk, not pierced through. (b) One of several steps, or offsets, in a tusk. See Tusk. (Webster's 1913.)

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