Dated form of tangential.

(geometry) Touching a curve at a single point but not crossing it at that point. / Of a topic, only loosely related to a main topic. / (rail transport, of track) Straight; not horizontally curved.

(differential geometry) A straight line touching a curve at a single point without crossing it there.

plural of tangent

(rare) In a tangent or tangential manner, tangentially.

(mathematics) a hyperbolic function that is written in symbol tanh and defined as the following:

(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 passing through P.

Synonym of arctangent

(topology, differential topology) An n-dimensional vector space that represents the set of all vectors tangent to given n-dimensional differentiable manifold M at point x.

plural of tangent space