Biology Define osmoregulator Asked by bookragstutor 13 years ago 9/10/2012 1:35 AM Last updated by anonymous 13 years ago 9/10/2012 1:35 AM
An animal whose body fluids have a different osmolarity than the environment, and that must either discharge excess water if it lives in a hypotonic environment or take in water if it inhabits a hypertonic environment.