the ratio of the number of moles of a given component of a mixture to the total number of moles of all the components.
Origin of mole fraction
First recorded in 1920–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
The ratio of the moles of one component of a system to the total moles of all components present.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.