spindle(redirected from sleep s)
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1. a pin tapered at one end or both ends, or something with this shape.
2. the thin, tapering figure occurring during metaphase of cell division, composed of microtubules radiating from the centrioles and connecting to the chromosomes at their centromeres. Called also mitotic spindle.
3. muscle spindle.
mitotic spindle spindle (def. 2).
muscle spindle a mechanoreceptor found between the skeletal muscle fibers; the muscle spindles are arranged in parallel with muscle fibers, and respond to passive stretch of the muscle but cease to discharge if the muscle contracts isotonically, thus signaling muscle length. The muscle spindle is the receptor responsible for the stretch or myotatic reflex.
sleep s's bursts of activity of a particular waveform in the electroencephalogram in light or early sleep.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
anatomy, pathology any fusiform cell or structure.
Farlex Partner Medical Dictionary © Farlex 2012
1. Biology A cytoplasmic network composed of microtubules along which the chromosomes are distributed during mitosis and meiosis.
2. Anatomy See muscle spindle.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
anatomy, pathology Any fusiform cell or structure.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
spindleA term used adjectivally in anatomy and referring to any elongated cell or structure pointed at both ends. Fusiform.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
In anatomy and pathology, any fusiform cell or structure.
Medical Dictionary for the Dental Professions © Farlex 2012