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Definition of Molality
1. Noun. Concentration measured by the number of moles of solute per kilogram of solvent.
Definition of Molality
1. the number of moles of solute per liter of solvent [n -TIES]
Medical Definition of Molality
1. Moles of solute per kilogram of solvent; the molarity is equal to mρ/(1 + mM), where m is the molality, ρ is the density of the solution, and M is the molar mass of the solute. Compare: molarity. Abbreviation: m (05 Mar 2000)