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Meaning of liquidus

liq•ui•dus

Pronunciation: (lik'wi-dus), [key]
— n. Physical Chem.
  1. (on a graph of temperature versus composition) the curve connecting the temperatures at which a liquid solution is in equilibrium with its vapor and with the solid solution. Cf. solidus.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.