known quantity
noun
Mathematics. a quantity whose value is given: in algebra, frequently represented by a letter from the first part of the alphabet, as a, b, or c.
any factor, circumstance, etc., that is already accepted or familiar: Her honesty is a known quantity.
Words nearby known quantity
knowledge worker, knowledge-based system, knowledgeable, knowles, known, known quantity, knowsley, knox, knox-johnston, knoxville, knp
Origin of known quantity
First recorded in 1975–80
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019