mean proportional

noun Mathematics.

(between two numbers a and b) a number x for which a/x = x/b: The number 3 is a mean proportional between 1 and 9.

Nearby words

  1. mean lethal dose,
  2. mean life,
  3. mean line,
  4. mean noon,
  5. mean planet,
  6. mean sea level,
  7. mean solar day,
  8. mean solar time,
  9. mean square,
  10. mean square deviation

Origin of mean proportional

First recorded in 1565–75 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019