SINCE 1828
quaternion
noun
qua·ter·ni·on
| \ kwə-ˈtər-nē-ən
, kwä-\
, kwä-\
Definition of quaternion
1
: a set of four parts, things, or persons
2
: any of a set of numbers that comprise a four-dimensional vector space with a basis consisting of the real number 1 and three imaginary units i, j, k, that follow special rules of multiplication, and that are used especially in computer graphics, robotics, and animation to rotate objects in three dimensions
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