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rotary

[roh-tuh-ree] /ˈroʊ tə ri/
adjective
1.
turning or capable of turning around on an axis, as a wheel.
2.
taking place around an axis, as motion.
3.
having a part or parts that turn on an axis, as a machine.
noun, plural rotaries.
4.
a rotary device or machine.
5.
Chiefly Northeastern U.S. traffic circle.
6.
Also called rotary converter. Electricity, synchronous converter.
7.
(initial capital letter) Rotary Club.
Origin
1725-1735
1725-35; < Medieval Latin rotārius (adj.), equivalent to Latin rot(a) wheel + -ārius -ary
Related forms
unrotary, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for rot aries

rotary

/ˈrəʊtərɪ/
adjective
1.
of, relating to, or operating by rotation
2.
turning or able to turn; revolving
noun (pl) -ries
3.
a part of a machine that rotates about an axis
4.
(US & Canadian) a roundabout (for traffic)
Word Origin
C18: from Medieval Latin rotārius, from Latin rota a wheel
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
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Word Origin and History for rot aries
rotary
1731, from M.L. rotarius "pertaining to wheels," from L. rota "wheel," from PIE base *roto- "to run, to turn, to roll" (cf. Skt. rathah "car, chariot;" Avestan ratho; Lith. ratas "wheel," ritu "I roll;" O.H.G. rad, Ger. Rad, Du. rad, O.Fris. reth, O.S. rath, O.Ir. roth, Welsh rhod "carriage wheel"). The international service club (founded by Paul P. Harris in Chicago in 1905) so called from the practice of clubs entertaining in rotation. Hence Rotarian (1911).
Online Etymology Dictionary, © 2010 Douglas Harper
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