Ectotherm

An ectotherm, from the Greek εκτός (ektós) `outside` and θερμός (thermós) `hot`, is an organism in which internal physiological sources of heat are of relatively small or quite negligible importance in controlling body temperature. Such organisms (for example frogs) rely on environmental heat sources, which permits them to operate...
Found on http://en.wikipedia.org/wiki/Ectotherm

ectotherm

(ek´to-thәrm) an animal that exhibits ectothermy. poikilotherm.
Found on http://www.encyclo.co.uk/local/21001

Ectotherm

an animal that cannot regulate its body temperature by an internal mechanism. Reptiles and amphibians are ectotherms. A cold
Found on http://www.kingsnake.com/articles/Glossary.html

Ectotherm

An animal whose body temperature is determined by its surroundings. Most sharks are ectothermic.
Found on http://www.world-of-sharks.com/shark-glossary.html

Ectotherm

An animal whose body temperature varies with the temperature of its surroundings (also called cold-blooded).
Found on http://www.sdnhm.org/fieldguide/herps/glossary.html

ectotherm

An organism that does not generate its own body heat and must use an external source of heat to warm itself. A cold-blooded organism. ... (09 Oct 1997) ...
Found on http://www.encyclo.co.uk/local/20973

Ectotherm

Animals in which body temperature is largely determined by external temperature sources and controlled by behavioural means.
Found on https://nzlizards.landcareresearch.co.nz/Resources/Glossary.aspx

ectotherm

ectotherm, ectothermy A cold-blooded animal; that is, an organism that regulates its body temperature largely by exchanging heat with its environment; such as, a reptile, amphibian, or fish.
Found on http://www.wordinfo.info/words/index/info/view_unit/4265/4

Ectotherm

It is a cold-blooded animal, such as a lizard, that relies on external warmth to raise its body temperature so that it can become active.
Found on http://www.vidyagyaan.com/general-knowledge/science/important-botany-terms-

ectotherm

`Cold-blooded` animal (see poikilothermy), such as a lizard, that relies on external warmth (ultimately from the Sun) to raise its body temperature so that it can become active. To cool the body, ectotherms seek out a cooler environment
Found on http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0006797.html
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