having a motor or motors, especially of a specified number or type (usually used in combination): a bimotored airplane.

1925–30; motor + -ed3

multimotored, adjective
unmotored, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Word Origin & History

mid-15c., from L. motor, lit. "mover," from movere "to move" (see move). From 15c. as "controller, prime mover" (in reference to God); sense of "agent or force that produces mechanical motion" is first recorded 1660s; that of "machine that supplies motive power" is from 1856.
With explosive use 20c. as a comb. form of motor-car (1895). Motor-boat is from 1902. First record of slang motor-mouth "fast-talking person" is from 1971.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

motor mo·tor (mō'tər)

  1. Causing or producing motion.

  2. Of or being nerves that carry impulses from the nerve centers to the muscles.

  3. Involving or relating to movements of the muscles.

  4. Of or relating to an organism's overt reaction to a stimulus.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
motor   (mō'tər)  Pronunciation Key 
Noun   A machine that uses energy, such as electric or chemical energy (as from burning a fuel), to produce mechanical motion. See also engine.

Adjective   Involving the muscles or the nerves that are connected to them. Compare sensory.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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