trivectorn.
/trʌɪˈvɛktə/ Geometry.
A set of three vectors, i.e. radii vectores (see radius n. 3g) from the same point.
ΚΠ
1869 A. Cayley Coll. Math. Papers VII. 400 We should have the focus and three points on the orbit; or (what is the same thing) three radius vectors from the focus, say a ‘trivector’.
This entry has not yet been fully updated (first published 1915; most recently modified version published online June 2018).
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n.1869