asymptote
Pronunciation:
/ˈeɪ̯sɪmtoʊ̯t/noun
Definitions
A straight line which a curve approaches arbitrarily closely, as they go to infinity. The limit of the curve, its tangent "at infinity".
(by extension) Anything which comes near to but never meets something else.
verb
Definitions
To approach, but never quite touch, a straight line, as something goes to infinity.