from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The plane containing all the lines tangent to a specified point on a surface.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Given a point P on a surface M, the tangent plane of M at point P, denoted by TP(M), is the plane passing through P which contains the tangent lines of all the curves on M passing through P.
from the GNU version of the Collaborative International Dictionary of English
- adj. a plane which touches a surface in a point or line.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the plane that contains all the lines tangent to a specific point on a surface
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