外がい温おん動どう物ぶつMeanings1nounectothermA biological term for an animal that relies on external heat sources to regulate body temperature, such as reptiles and amphibians.爬は虫ちゅう類るいは外がい温おん動どう物ぶつの代だい表ひょう例れいだ。Reptiles are a typical example of ectotherms.
