From Old French testard ( “ someone with a big head ” ) , a pejorative from teste ( “ head ” ) .
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Chambers (1908)
1908- TesterEnglish · e-38700-4739
Tester, tes′tėr, n. a flat canopy, esp. over the head of a bed. [O. Fr. teste (Fr. tête), the head—L. testa, an earthen pot, the skull.]
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Tester, tes′tėr, n. a sixpence—also Tes′tern.—v.t. Tes′tern (Shak.), to present or reward with a sixpence. [O. Fr. teston—teste (Fr. tête), the head, from that of Louis XII. on it.]
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Tester
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