Dictionary

tessera

noun tes·sera \ˈte-sə-rə\
plural tes·ser·ae\-ˌrē, -ˌrī\

Definition of TESSERA

1
:  a small tablet (as of wood, bone, or ivory) used by the ancient Romans as a ticket, tally, voucher, or means of identification
2
:  a small piece (as of marble, glass, or tile) used in mosaic work

Origin of TESSERA

Latin, probably ultimately from Greek tessares four; from its having four corners — more at four
First Known Use: 1538

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