abacus

[ ab-uh-kuh s, uh-bak-uh s ]
/ ˈæb ə kəs, əˈbæk əs /

noun, plural ab·a·cus·es, ab·a·ci [ab-uh-sahy, -kahy, uh-bak-ahy] /ˈæb əˌsaɪ, -ˌkaɪ, əˈbæk aɪ/.

a device for making arithmetic calculations, consisting of a frame set with rods on which balls or beads are moved.
Architecture. a slab forming the top of the capital of a column.

QUIZZES

ELEMENTARY SCHOOL PUNCTUATION QUIZ

Punctuation marks help make writing easy to read and understand. Some of the most important ones are the period (.), comma (,), question mark (?), and exclamation point (!). How well do you know how to use them? Find out in this quiz!
Question 1 of 10
Which punctuation mark is best for this sentence? "Can I watch a movie __"

Origin of abacus

1350–1400; Middle English < Latin: board, counting board, re-formed < Greek ábax
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for abaci

British Dictionary definitions for abaci

abacus
/ (ˈæbəkəs) /

noun plural -ci (-ˌsaɪ) or -cuses

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
architect the flat upper part of the capital of a column

Word Origin for abacus

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 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012