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rotations

 [roh-tey-shuhn]   Origin

ro·ta·tion

   [roh-tey-shuhn]
noun
1.
the act of rotating; a turning around as on an axis.
2.
Astronomy.
a.
the movement or path of the earth or a heavenly body turning on its axis.
b.
one complete turn of such a body.
3.
regularly recurring succession, as of officials.
4.
Agriculture. crop rotation.
5.
Mathematics.
a.
an operation that rotates a geometric figure about a fixed point.
b.
curl (def. 17).
EXPAND
6.
Pool. a game in which the balls are played in order by number.
7.
Baseball. pitching rotation.
COLLAPSE
Origin:
1545–55; < Latin rotātiōn- (stem of rotātiō) a rotation, rolling, equivalent to rotāt(us) (see rotate1) + -iōn- -ion

Related forms
ro·ta·tion·al, adjective
non·ro·ta·tion, noun
non·ro·ta·tion·al, adjective
un·ro·ta·tion·al, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Rotations is always a great word to know.
So is interrobang. Does it mean:
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
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Etymonline
Word Origin & History

rotation
1555, from L. rotationem (nom. rotatio), noun of action from rotare "revolve, roll," from PIE *roto- (see rotary). Verb rotate is an 1808 back-formation. Rotator "muscle which allows a part to be moved circularly" is recorded from 1676.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

rotation ro·ta·tion (rō-tā'shən)
n.

  1. The act or process of turning around a center or an axis.

  2. Regular and uniform variation in a sequence or series, as in the recurrence of symptoms of a disease.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
rotation   (rō-tā'shən)  Pronunciation Key 

  1. The motion of an object around an internal axis.

  2. A single complete cycle of such motion. See Note at revolution.

  3. A transformation of a coordinate system in which the new axes have a specified angular displacement from their original position while the origin remains fixed.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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