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rotational

 - 6 dictionary results

ro⋅ta⋅tion

  [roh-tey-shuhn]
Use rotational in a Sentence
–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. Baseball. pitching rotation.
Origin:
1545–55; < L rotātiōn- (s. of rotātiō) a rotation, rolling, equiv. to rotāt(us) (see rotate 1 ) + -iōn- -ion

Related forms:
ro⋅ta⋅tion⋅al, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To rotational
ro·ta·tion   (rō-tā'shən)   
n.  

    1. The act or process of turning around a center or an axis: the axial rotation of the earth.

    2. A single complete cycle of such motion.

  2. Mathematics 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.

  3. Regular and uniform variation in a sequence or series: a rotation of personnel; crop rotation.

  4. Games An order of shooting balls in billiards in which the ball with the lowest number on the table is always pocketed first.

ro·ta'tion·al adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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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, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: ro·ta·tion
Pronunciation: rO-'tA-sh&n
Function: noun
: the action or process of rotating on or as if on an axis or center;specifically : the turning of a body part about its long axis as if on a pivot <rotation of the head to look over the shoulder> —ro·ta·tion·al /-shn&l, -sh&n-&l/ adjective
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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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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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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