abaculus

noun abac·u·lus \ə-ˈba-kyə-ləs\

Definition of abaculus

plural

abaculi

\ə-ˈba-kyə-ˌlī, -ˌlē\
  1. :  a tile used in mosaic :  tessera

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Origin and Etymology of abaculus

misreading of Latin ab oculīs “out of view,” as if diminutive of abacus abacus


First Known Use: 1844


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