poikilotherm

[ poikə-lə-thûrm′, poi-kĭlə- ]

n.

An organism, such as a fish or reptile, having a body temperature that varies with the temperature of its surroundings; an ectotherm.

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Scientific definitions for poikilotherm

poikilotherm
[ poi-kĭlə-thûrm′ ]

See ectotherm.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.