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## vertex

```  2  definitions  found

From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]:

Vertex  \Ver"tex\,  n.;  pl  {Vertexes},  L.  {Vertices}.  [L.  vertex,
-icis,  a  whirl,  top  of  the  head,  top  summit,  from  vertere  to
turn.  See  {Verse},  and  cf  {Vortex}.]
A  turning  point;  the  principal  or  highest  point;  top  summit;
crown;  apex.  Specifically:
a  (Anat.)  The  top  or  crown,  of  the  head.
b  (Anat.)  The  zenith,  or  the  point  of  the  heavens  directly
c  (Math.)  The  point  in  any  figure  opposite  to  and  farthest
from  the  base;  the  terminating  point  of  some  particular
line  or  lines  in  a  figure  or  a  curve;  the  top  or  the
point  opposite  the  base.

Note:  The  principal  vertex  of  a  conic  section  is  in  the
parabola,  the  vertex  of  the  axis  of  the  curve:  in  the
ellipse,  either  extremity  of  either  axis,  but  usually
the  left-hand  vertex  of  the  transverse  axis;  in  the
hyperbola,  either  vertex,  but  usually  the  right-hand
vertex  of  the  transverse  axis.

{Vertex  of  a  curve}  (Math.),  the  point  in  which  the  axis  of
the  curve  intersects  it

{Vertex  of  an  angle}  (Math.),  the  point  in  which  the  sides  of
the  angle  meet

{Vertex  of  a  solid},  or  {of  a  surface  of  revolution}  (Math.),
the  point  in  which  the  axis  pierces  the  surface.

From  WordNet  r  1.6  [wn]:

vertex
n  1:  the  point  of  intersection  of  lines  or  the  point  opposite  the
base  of  a  figure
2:  the  highest  point  of  something  [syn:  {peak},  {apex},  {acme}]
```