- the movement or path of the earth or a heavenly body turning on its axis.
- one complete turn of such a body.
Origin of rotation
Examples from the Web for rotational
Historical Examples of rotational
The rotational speed of Earth at this latitude is seven-seven-eight.Space Tug
The total, however, of the rotational moment of momentum of the system barely reaches two per cent.Time and Tide
Robert S. (Robert Stawell) Ball
What, then, is the effect of the rotational velocity of the surface of the earth on the atmosphere near to it?Aether and Gravitation
William George Hooper
This rotational motion is also found in the nebul and star clusters as well as in the stars and planets.Astronomy for Young Folks
Isabel Martin Lewis
It is important to distinguish between two types of strain: the “rotational” type and the “irrotational” type.
- a circular motion of a configuration about a given point or line, without a change in shape
- a transformation in which the coordinate axes are rotated by a fixed angle about the origin
- another name for curl (def. 11) Abbreviation (for sense 4c): rot
- the spinning motion of a body, such as a planet, about an internal axisCompare revolution (def. 5a)
- one complete turn in such motion
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 *roto- (see rotary).