quaternion Hear it!

quaternion definition

qua·ter·nion (kwə tʉr′nē ən, kwä-)

noun

  1. a set of four
  2. Math. an expression that is the sum of four terms, one of which is real and three of which contain imaginary units, and that can be written as the sum of a scalar and a three-dimensional vector

Etymology: ME < LL quaternio < L quaterni: see quaternary

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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