from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun An organism that depends on external sources for its body heat.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biology a
cold-blooded animalwhich regulatesits body temperatureby exchanging heatwith its surroundings
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun an animal whose body temperature varies with the temperature of its surroundings; any animal except birds and mammals
Sorry, no etymologies found.
That's why several zoos are participating in a sort of sperm bank for snot otters, says Dale McGinnity, ectotherm curator for the Nashville Zoo.
Whereas an endotherm expends a tremendous amount of energy just to maintain a constant body temperature, a cold ectotherm can pass months at a time requiring little food or oxygen.
Endotherms differ from an ectotherm because they typically have core temperatures above that of the surrounding environment, whereas the core temperatures of ectotherms depend on external sources of heat – primarily from solar radiation.
Turtle • Endotherm / ectotherm - Migration to northern water • Problems - Stagnant ocean -