unrotational

rotation

[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 ).
6.
Pool. a game in which the balls are played in order by number.
7.
Relevant Questions

Origin:
1545–55; < Latin rotātiōn- (stem of rotātiō) a rotation, rolling, equivalent to rotāt(us) (see rotate1) + -iōn- -ion

nonrotation, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
 rotation (rəʊˈteɪʃən) —n 1. the act of rotating; rotary motion 2. a regular cycle of events in a set order or sequence 3. a planned sequence of cropping according to which the crops grown in successive seasons on the same land are varied so as to make a balanced demand on its resources of fertility 4. maths a.  a circular motion of a configuration about a given point or line, without a change in shape b.  a transformation in which the coordinate axes are rotated by a fixed angle about the origin c.  another name for curl Abbreviation (for sense 4c): rot 5. a.  Compare revolution the spinning motion of a body, such as a planet, about an internal axis b.  one complete turn in such motion ro'tational —adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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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
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American Heritage
Science Dictionary
 rotation   (rō-tā'shən)  Pronunciation Key  The motion of an object around an internal axis. A single complete cycle of such motion. See Note at revolution. 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
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Synonyms