名詞 asymptote:

1. a straight line that is the limiting value of a curve; can be considered as tangent at infinity

as.ymp.tote

n.Mathematics （名詞）【數(shù)學】
A line considered a limit to a curve in the sense that the perpendicular distance from a moving point on the curve to the line approaches zero as the point moves an infinite distance from the origin.
漸近線：與曲線極限相關的一條直線，當曲線上某動點沿該曲線的一個分支移向無窮遠時，動點到該直線的垂直距離趨于零

來源：
Ultimately from Greek asumptôtos [not intersecting]
最終源自 希臘語 asumptôtos [非橫切]
a- [not] * see a-
a- [非…] *參見 a-
sumptôtos [intersecting] from sumpiptein [to converge] sun- [syn-] piptein ptô- [to fall] * see pet-
sumptôtos [橫切] 源自 sumpiptein [收斂，集聚] sun- [前綴，表示.同時.] piptein ptô- [落下] *參見 pet-

【引伸】
as.ymptot.ic
as.ymptot.ically
adv.（副詞）