Definitions for "Ectothermic"
Having an internal temperature that is controlled largely the by temperature of the external environment. For example, lizards are ectothermic and often bask in the sun to warm up.
a species that regulates its body temperature by exchanging heat with the surroundings. Ectothermic species are also called "cold-blooded."
Cold blooded, but able to control their body temperatures (thermoregulate), with considerable precision, depending on the species