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American Dictionary of the English Language

Webster's Dictionary 1828

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THUMB

THUMB'ED

THUM'MERSTONE, noun A mineral so called from Thus, in Saxony, where it was found. It is called also axinite, from the resemblance of its flat sharp edges to that of an ax. It is either massive or crystallized; its crystals are in the form of a compressed oblique rhomboidal prism. It is of the silicious kind, and of a brown gray or violet color.