quaternion[kwə tʉr′nē ən, kwä-]
- a set of four
- 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
Origin: Middle English from Late Latin quaternio from Classical Latin quaterni: see quaternary
Used by arrangement with John Wiley & Sons, Inc.
- A set of four persons or items.
- Mathematics Any number of the form a + bi + cj + dk where a, b, c, and d are real numbers, ij = k, i2 = j2 = -1, and ij = -ji. Under addition and multiplication, quaternions have all the properties of a field, except multiplication is not commutative.
Origin: Middle English quaternioun, from Late Latin quaterniō, quaterniōn-, from Latin quaternī, by fours, from quater, four times; see kwetwer- in Indo-European roots.
quaternion - Science Definition
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