DICT.TW Dictionary Taiwan
Tes·se·ra n.; pl. Tesserae A small piece of marble, glass, earthenware, or the like, having a square, or nearly square, face, used by the ancients for mosaic, as for making pavements, for ornamenting walls, and like purposes; also, a similar piece of ivory, bone, wood, etc., used as a ticket of admission to theaters, or as a certificate for successful gladiators, and as a token for various other purposes.
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tessera
n : a small square tile of stone or glass used in making mosaics
[also: tesserae (pl)]