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rotation - 10 dictionary results

ro⋅ta⋅tion

  [roh-tey-shuhn]
Use rotation 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

curl

  [kurl]
–verb (used with object)
1. to form into coils or ringlets, as the hair.
2. to form into a spiral or curved shape; coil.
3. to adorn with, or as with, curls or ringlets.
–verb (used without object)
4. to grow in or form curls or ringlets, as the hair.
5. to become curved or undulated.
6. to coil.
7. to play at the game of curling.
8. to progress in a curving direction or path; move in a curving or spiraling way: The ball curled toward the plate.
–noun
9. a coil or ringlet of hair.
10. anything of a spiral or curved shape, as a lettuce leaf, wood shaving, etc.
11. a coil.
12. the act of curling or state of being curled.
13. Plant Pathology.
a. the distortion, fluting, or puffing of a leaf, resulting from the unequal development of its two sides.
b. a disease so characterized.
14. Also called rotation. Mathematics.
a. a vector obtained from a given vector by taking its cross product with the vector whose coordinates are the partial derivative operators with respect to each coordinate.
b. the operation that produces this vector.
15. Weightlifting.
a. an underhand forearm lift in which the barbell, held against the thighs, is raised to the chest and then lowered while keeping the legs, upper arms, and shoulders taut.
b. a similar forearm lift using a dumbbell or dumbbells, usually from the side of the body to the shoulders.
—Verb phrase
16. curl up, to sit or lie down cozily: to curl up with a good book.
—Idioms
17. curl one's lip, to assume or display an expression of contempt: He curled his lip in disdain.
18. curl one's or the hair, to fill with horror or fright; shock: Some of his stories about sailing across the Atlantic are enough to curl one's hair.
Origin:
1400–50; late ME, appar. back formation from curled, metathetic var. of ME crulled (ptp.) crul (adj.); cf. MD crullen to curl, cruller

Related forms:
curl⋅ed⋅ly  [kur-lid-lee, kurld-] , adverb
curl⋅ed⋅ness, noun

pitching rotation

 
–noun Baseball.
the regular, scheduled succession of starting pitchers designated by a manager: a four-man pitching rotation in September.
Also called rotation.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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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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Rotation

Ro*ta"tion\, n. [L. rotatio: cf. F. rotation.]

1. The act of turning, as a wheel or a solid body on its axis, as distinguished from the progressive motion of a revolving round another body or a distant point; thus, the daily turning of the earth on its axis is a rotation; its annual motion round the sun is a revolution.

2. Any return or succesion in a series.

Moment of rotation. See Moment of inertia, under Moment.

Rotation in office, the practice of changing public officers at frequent intervals by discharges and substitutions.

Rotation of crops, the practices of cultivating an orderly succession of different crops on the same land.

Rotation

Ro*ta"tion\, a. Pertaining to, or resulting from, rotation; of the nature of, or characterized by, rotation; as, rotational velocity.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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Language Translation for : rotation
Spanish: revolución, vuelta,
German: die Umdrehung,
Japanese: 回転
More Translations »

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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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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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.
Cite This Source
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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