- 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
Hence in order to keep up the rotational momentum, which as we have seen must remain constant, the mass must rotate quicker.Darwin and Modern Science|A.C. Seward and Others
By this time the student should have found himself sufficiently prepared to take up problems of rotational motion.
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
Searching problems and discussion are instigated at once, and the notion of rotational equilibrium and force moments brought in.
How can one who is ignorant of the existence and characteristics of rotational inertia understand a galvanometer?
British Dictionary definitions for rotational
- 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
Word Origin and History for rotational (1 of 2)
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).