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| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
ectotherm ec·to·therm (ěk'tə-thûrm')
n.
An organism that regulates its body temperature largely by exchanging heat with its surroundings; a poikilotherm.
ectothermic (ěk'tə-thûr'mĭk) or ec·to·ther·mal (-məl) or ec·to·ther·mous (-məs)
adj.
Of or relating to an organism that regulates its body temperature largely by exchanging heat with its surrounding environment.
| ectotherm (ěk'tə-thûrm') Pronunciation Key
A cold-blooded organism. Also called poikilotherm. |