tangent
1. [ noun ] (mathematics,geometry) a straight line or plane that touches a curve or curved surface at a point but does not intersect it at that point
Related terms: straight_line
2. [ noun ] (mathematics) ratio of the opposite to the adjacent side of a right-angled triangle
Synonyms: tan
Related terms: trigonometric_function
Similar spelling:   tangential
  tangency
  Tangeman
  tangshan
  tanginess