What is a disk of bone, wood, or other material, which is made into a button by covering it with cloth. [Written also buttonmould.] Fossil buttonmolds, joints of encrinites. See Encrinite called?

buttonmold — A disk of bone, wood, or other material, which is made into a button by covering it with cloth. [Written also buttonmould.] Fossil buttonmolds, joints of encrinites. See Encrinite. (Webster's 1913.)

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