English word ectotherm comes from English -therm, English ecto- (Outside.)
| Dictionary entry | Language | Definition |
|---|---|---|
| -therm | English (eng) | (biology) used to name types of animal having a specified form of body temperature mechanism. Heat. |
| ecto- | English (eng) | Outside. |
| ectotherm | English (eng) | (biology) An animal, such as frog, fish or reptile, which has a limited ability to regulate its body temperature and whose body temperature thus depends on the ambient temperature. |