| 释义 |
ver·tex
\ˈvər]ˌteks, ˈvə̄], ˈvəi]\ noun
(plural verti·ces \]d.əˌsēz, ]tə-\ ; also vertexes \]ˌteksə̇z\)
Etymology: Latin vertex, vortex whirl, whirlpool, highest point, peak, from Latin vertere to turn — more at worth
1.
a.
(1) : the point opposite to and farthest from the base in a figure
(2) : the termination or intersection of lines or curves
< the vertex of an angle >
(3) : a point where an axis of an ellipse, parabola, or hyperbola intersects the curve itself
b. : the point of intersection of an axially symmetrical optical surface with its axis of symmetry
c.
(1) : zenith 1; also : the point on the limb of a celestial body nearest the zenith
(2) : a point on the celestial sphere toward which star streaming is directed
2. : the top of the head: as
a. : the upper part of the head of an insect in front above the antennae and between the compound eyes
b.
(1) : the highest point of the human skull when held in the eye-ear plane
(2) : the highest median point of the head of the living human when in a natural position
3. : a principal or highest point : summit, apex
< a monument on the vertex of the hill commands a breathtaking view >
often : the high point of an arch : crown, keystone |