Definition of Parabola
Pa`rab´o`la
n.
1.
(Geom.)
A
kind
of
curve
;
one
of
the
conic
sections
formed
by
the
intersection
of
the
surface
of
a
cone
with
a
plane
parallel
to
one
of
its
sides
.
It
is
a
curve
,
any
point
of
which
is
equally
distant
from
a
fixed
point
,
called
the
focus
,
and
a
fixed
straight
line
,
called
the
directrix
.
See
Focus
.
Related Words
arc
,
bow
,
catacaustic
,
catenary
,
caustic
,
circle
,
conchoid
,
crook
,
curl
,
curve
,
diacaustic
,
ellipse
,
festoon
,
hook
,
hyperbola
,
lituus
,
sinus
,
tracery
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