What is "eurytherm"

n. (context biology English) An organism, often specifically an ectotherm, that can function at a wide range of temperatures

A eurytherm is an organism, often specifically an ectotherm, that can function at a wide range of different body temperatures.

For example, desert pupfish can function in waters from 4º to 45ºC.

Eurytherms are contrasted to stenothermic organisms.