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Webster 1913 Edition

Vector

Vec′tor

,
Noun.
[L., a bearer, carrier. fr.
vehere
,
vectum
, to carry.]
1.
Same as
Radius vector
.
2.
(Math.)
A directed quantity, as a straight line, a force, or a velocity. Vectors are said to be equal when their directions are the same and their magnitudes equal. Cf.
Scalar
.
☞ In a triangle, either side is the vector sum of the other two sides taken in proper order; the process finding the vector sum of two or more vectors is vector addition (see under
Addition
).

Webster 1828 Edition

Vector

VEC'TOR

,
Noun.
[L. from veho, to carry.] In astronomy, a line supposed to be drawn from any planet moving round a center or the focus of an ellipsis, to that center or focus.

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