homoiosmotic

adjective
ho·​moi·​os·​mot·​ic | \ˌhō-ˌmȯi-äz-ˈmät-ik \

Medical Definition of homoiosmotic 

: having a bodily osmotic regulating mechanism and body fluids that differ in osmotic pressure from the surrounding medium or from seawater homoiosmotic animals include all the land and freshwater vertebrates — compare poikilosmotic

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