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# abacus

[ab-uh-kuh s, uh-bak-uh s] /ˈæb ə kəs, əˈbæk əs/
noun, plural abacuses, abaci
[ab-uh-sahy, -kahy, uh-bak-ahy] /ˈæb əˌsaɪ, -ˌkaɪ, əˈbæk aɪ/ (Show IPA)
1.
a device for making arithmetic calculations, consisting of a frame set with rods on which balls or beads are moved.
2.
Architecture. a slab forming the top of the capital of a column.
Origin
1350-1400
1350-1400; Middle English < Latin: board, counting board, re-formed < Greek ábax
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for abacuses

## abacus

/ˈæbəkəs/
noun (pl) -ci (-ˌsaɪ), -cuses
1.
a counting device that consists of a frame holding rods on which a specific number of beads are free to move. Each rod designates a given denomination, such as units, tens, hundreds, etc, in the decimal system, and each bead represents a digit or a specific number of digits
2.
(architect) the flat upper part of the capital of a column
Word Origin
C16: from Latin, from Greek abax board covered with sand for tracing calculations, from Hebrew ābhāq dust
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for abacuses

## abacus

n.

late 14c., "sand table for drawing, calculating, etc.," from Latin abacus, from Greek abax (genitive abakos) "counting table," from Hebrew abaq "dust," from root a-b-q "to fly off." Originally a drawing board covered with dust or sand that could be written on to do mathematical equations. Specific reference to a counting frame is 17c. or later.

Online Etymology Dictionary, © 2010 Douglas Harper
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### Word Value for abacuses

12
15
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