(differential geometry) Given a point P on a surface M, the tangent plane of M at point P, denoted by T_P(M), is the plane passing through P which contains the tangent lines of all the curves on M ...

A person who paints graffiti in public places, especially one who specializes in high-quality work rather than vandalism.

(medicine, archaic) gastroenteritis

(bridge, whist) A plain suit in which a player (or side) could, except for trumping, take tricks with all of his or her remaining cards.