least common denominator
least common denominator definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
the least common multiple of the denominators of two or more fractions
least common denominator definition by American Heritage Dictionary
noun Abbr. lcd
The least common multiple of the denominators of a set of fractions: The least common denominator of 1/3 and 1/4 is 12. Also called lowest common denominator.