rotaries

rotary

[roh-tuh-ree]
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:
1725–35; < Medieval Latin rotārius (adj.), equivalent to Latin rot(a) wheel + -ārius -ary

unrotary, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
rotary (ˈrəʊtərɪ)
 
adj
1.  of, relating to, or operating by rotation
2.  turning or able to turn; revolving
 
n , -ries
3.  a part of a machine that rotates about an axis
4.  (US), (Canadian) a roundabout (for traffic)
 
[C18: from Medieval Latin rotārius, from Latin rota a wheel]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

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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