cold-blooded

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poi·ki·lo·ther·mic

, poikilothermalpoikilothermous (poy'ki-lō-ther'mic, -măl, -mŭs),
1. Varying in temperature according to the temperature of the surrounding medium; denoting the so-called cold-blooded animals, such as the reptiles and amphibians, and the plants.
2. Capable of existence and growth in media of varying temperatures. Compare: heterothermic, homeothermic.
3. Causing a disruption of normal hypothalamic thermoregulatory function, as seen with drugs such as phenothiazines.
[poikilo- + G. thermē, heat]
Farlex Partner Medical Dictionary © Farlex 2012

cold-blooded

or

coldblooded

(kōld′blŭd′ĭd)
adj.
1.
a. Lacking feeling or emotion: a cold-blooded killer.
b. Executed without feeling or emotion: a cold-blooded crime; a cold-blooded performance of the concerto.
2. Ectothermic.

cold′-blood′ed·ly, cold′blood′ed·ly adv.
cold′-blood′ed·ness, cold′-blood′ed·ness n.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

cold-blooded

see POIKILOTHERM.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005