tangent

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. a straight line or plane that touches a curve or curved surface at a point but does not intersect it at that point (Freq. 18)
• Derivationally related forms:
tangential, tangency
• Hypernyms:
straight line
2. ratio of the opposite to the adjacent side of a right-angled triangle
• Syn:
tan
• Derivationally related forms:
tangential
• Hypernyms:
trigonometric function, circular function