Crossword clues for rotation
rotation
Longman Dictionary of Contemporary English
The Collaborative International Dictionary
Rotation \Ro*ta"tion\, a. Pertaining to, or resulting from, rotation; of the nature of, or characterized by, rotation; as, rotational velocity.
Rotation \Ro*ta"tion\, n. [L. rotatio: cf. F. rotation.]
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.
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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.
Douglas Harper's Etymology Dictionary
1550s, from Latin rotationem (nominative rotatio) "a turning about in a circle," noun of action from past participle stem of rotare "turn round, revolve, whirl about, roll," from PIE *ret- "to run, roll" (see rotary).
Wiktionary
n. (context chiefly uncountable English) The act of turning around a centre or an axis.
WordNet
n. the act of rotating as if on an axis; "the rotation of the dancer kept time with the music" [syn: rotary motion]
(mathematics) a transformation in which the coordinate axes are rotated by a fixed angle about the origin
a single complete turn (axial or orbital); "the plane made three rotations before it crashed"; "the revolution of the earth about the sun takes one year" [syn: revolution, gyration]
a planned recurrent sequence (of crops or personnel etc.); "crop rotation makes a balanced demand on the fertility of the soil"; "the manager had only four starting pitchers in his rotation"
Wikipedia
A rotation is a circular movement of an object around a center (or point) of rotation . A three-dimensional object always rotates around an imaginary line called a rotation axis. If the axis passes through the body's center of mass, the body is said to rotate upon itself, or spin. A rotation about an external point, e.g. the Earth about the Sun, is called a revolution or orbital revolution, typically when it is produced by gravity.
Rotation is a circular motion of a body about a center.
Rotation may also refer to:
Rotation in mathematics is a concept originating in geometry. Any rotation is a motion of a certain space that preserves at least one point. It can describe, for example, the motion of a rigid body around a fixed point. A rotation is different from other types of motions: translations, which have no fixed points, and (hyperplane) reflections, each of them having an entire -dimensional flat of fixed points in a - dimensional space.
Mathematically, a rotation is a map. All rotations about a fixed point form a group under composition called the rotation group (of a particular space). But in mechanics and, more generally, in physics, this concept is frequently understood as a coordinate transformation (importantly, a transformation of an orthonormal basis), because for any motion of a body there is an inverse transformation which if applied to the frame of reference results in the body being at the same coordinates. For example, in two dimensions rotating a body clockwise about a point keeping the axes fixed is equivalent to rotating the axes counterclockwise about the same point while the body is kept fixed. These two types of rotation are called active and passive transformations.
Rotation, sometimes called rotation pool or 61, is a pocket billiards game, requiring a standard pool table, and triangular rack of fifteen pool balls, in which the lowest-numbered on the table must be always struck by the cue ball first, to attempt to numbered balls for . Rotation is similar in many ways to nine-ball, but its scoring system is not unlike that of snooker and eight-ball.
As with nine-ball and other similar-format games, some attractions of rotation include performing unconventional or difficult shots to reach the correct ball, and quite often making risky attempts to score higher amounts of points by performing advanced shots such as , and .
Rotation is a sport in the Asian Games and Southeast Asian Games.
Rotation is similar to fifteen-ball pool, except that in the latter a player can shoot at any object ball.
In broadcasting, rotation is the repeated airing of a limited playlist of songs on a radio station or satellite radio channel, or music videos on a TV network. They are usually in a different order each time. However, they are not completely shuffled, so as to avoid varying the time between any two consecutive plays of a given song by either too much or too little. Stations playing new music typically have a short rotation of around four hours, while stations playing " classics" may go as long as eight hours. College radio and indie radio stations sometimes have no particular rotation, only the music director's suggested lists for the disc jockeys, or are totally freeform radio. Broadcast automation systems handle a limited rotation quite well, in turn making voice tracking easy. Even if a live person is present, the automation system at commercial stations usually picks the music ahead of time out of the current rotation, thus the DJ becomes only an announcer.
Heavy rotation or power rotation is a term that applies to a list of songs that get the most airplay on a radio station. Songs in heavy rotation will be played many times in a 24-hour period. A reason for playing the same song more than once a day is that many listeners tune in expecting to hear their favorite song, and most listeners don't listen to the radio for extended periods of time. However, this also leads to listener fatigue for those who work in stores and must hear the same songs repeatedly every day.
A song placed in "lunar rotation" is one that is only played in off-peak hours, usually late at night. There can be various reasons for this, but such songs are usually not hits and are played because of the personal musical preference of the DJ or programmer, to avoid more stringent daypart-based regulations on music content or to fulfill a broadcasting obligation such as Canadian content quotas. (See also " beaver hour".)
A song placed in recurrent rotation continues to be played on a radio station long after it has left the current charts.
Category:Broadcasting
Rotation is a 1949 film directed by Wolfgang Staudte and produced under the auspices of Deutsche Film-Aktiengesellschaft (DEFA) in East Germany. It began filming on 29 September 1948 and premiered in theaters on 16 September 1949.
Rotation is the second studio album by pop punk band Cute Is What We Aim For, released on June 24, 2008. It debuted at #21 on the U.S. Billboard 200 albums chart selling around 22,000 copies. As of July 2008, the album has sold a total of 45,204 copies.
Rotation is a live album by multi-instrumentalist and composer Joe McPhee, recorded in 1976 and first released on the Swiss HatHut label.
In aviation, rotation refers to the action of applying back pressure to a control device, such as a yoke, side-stick or centre stick, to lift the nose wheel off the ground during the takeoff roll. Proper rotation is important for safety reasons and to decrease takeoff distance. Rotation occurs when the aircraft lifts up from the runway and takes off once it reaches the optimal speed for a safe takeoff, which is called the V speed. Certain airplanes like Boeing 727, Boeing 767, and Concorde require a high degree of rotation during takeoff, but not all airplanes require this degree of rotation. If too much rotation is added for takeoff, the airplane can face a tailstrike, or, in the worst case, will stall and crash.
Rotation is a flight concept which is integral to the design of many tricycle gear aircraft and is not applicable to conventional gear aircraft. At the design phase in tricycle gear aircraft there is a selection of the on ground angle of attack of the wing. This angle is created in the mains and nose gear leg length design which creates a negative angle of attack relative to the ground. The effect of this is that during the takeoff roll the wing will have negative lift until the pilot commands the nose skyward to create a positive angle of attack of the wing. At the end of the flight the concept is reversed where at touchdown all tires touch the runway and the wing is instantly moved to a negative angle of attack which causes the wing to stop lifting. At one time Cessna Aircraft featured this idea as "Land O Matic" so noted on all of their tricycle gear aircraft.
Usage examples of "rotation".
In both cases, the rotations could be treated algebraically, and the traditional way to get a handle on this was to make use of a set of matrices of complex numbers whose relationships mimicked the algebra in question.
Normers verified his theory of gravimagnetic rotations, and it turned out, in addition, that on planets of type C Meoli there can exist not tri- but tetraploids of silicon, and on that moon where Arder nearly did himself in there is nothing but lousy lava and bubbles the size of skyscrapers.
We will act for our own defense only for a period of two rotations of Gilver, in which time you are to persuade your newly arrived ships to break off combat so that we and your leaders may extrapolate ways in which we need not destroy each other.
The star twinkled, trembled and turned, at first with a slow gyratory motion, then faster and faster, increasing its circumference at every rotation until it formed a brilliant disk, and we no longer saw the dwarf, who seemed absorbed into its light.
A frame zoomed on one of the attitude jets, a gauzy glittering net molded magnetically into a hyperboloid of rotation with a line of white fire running down the axis.
Its ring formation and myriad satellites made it a rare sight for those tourists who could afford the steep transit fees, and the complex rotation of it and Islendia around Isel led to very strange day cycles.
In some few cases this is effected by the rotation of the blade, the petiole not being either raised or lowered to any considerable extent.
In the final few picoseconds, the mass will be multiplied by a factor of about an octillion, and with a spin to bring the rotation parameter up to point ninety-nine, that will hold the static limit far enough above the event horizon to allow the finishing touches of hydrogen and antihydrogen infall.
Felipe excelled at playground basketball and was a solid enough player to work his way into the five-on-five rotation games that offered cash payouts to the winners.
On these lands it is usually grown in long rotations for pasture and also for hay, and when the sod is again plowed, it is followed by corn, potatoes, rape, and grains grown for soiling uses, since such land has naturally high adaptation for these.
This inequality depends on the centrifugal force of rotation, and on the spheroidal figure of the earth due to that rotation.
On the way to the teensy cabin they would occupy in rotation with three other couples, Nanoannie caught a glimpse of Tinquesta and Raddol, arguing, maybe about whether they wanted to get married.
A violent upswell spun the Work Bug nearly two full rotations around its forward axis, its thrusters screeching as Stevens fought to regain control.
Once there, it would be caught up in the almost imperceptible rotation in which everything inside Virga participated--something to do with orbits and tides, that was all she knew of that.
The torsion or rotation of leaves and leaflets, which occurs in so many cases, apparently always serves to bring their upper surfaces into close approximation with one another, or with other parts of the plant, for their mutual protection.