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Meaning of osmoregulation

os•mo•reg•u•la•tion

Pronunciation: (oz"mō-reg"yu-lā'shun, os"-), [key]
— n.
  1. the process by which cells and simple organisms maintain fluid and electrolyte balance with their surroundings.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.