ectotherm Syllabification: (ec·to·therm)Pronunciation: /ˈektəˌTHərm/Definition of ectotherm noun Zoology an animal that is dependent on external sources of body heat. Often contrasted with endotherm.Compare with poikilotherm.Derivatives ectothermic adjective ectothermy noun ectotherm in other Oxford dictionaries Definition of ectotherm in the British & World English dictionary
