Meaning & use
Osmoregulator
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An organism, organ, or cell that actively regulates the concentration of water and salts in its body to maintain a stable internal balance.
See it in a sentence
Salmon are strong osmoregulators, adjusting their physiology as they move between freshwater and saltwater.
The kidneys act as the body's primary osmoregulator, controlling fluid and electrolyte balance.
A note on using this word
Contrasted with 'osmoconformers,' organisms that instead let their internal salt concentration match their surrounding environment.
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