Noun
Any
of
a
family
of
curves
defined
as
the
locus
of
points
''
p
'',
such
that
each
''
p
''
is
on
a
line
that
passes
through
a
given
fixed
point
''
P
''
and
intersects
a
given
curve
, ''
C
'',
and
the
distance
from
''
p
''
to
the
point
of
intersection
with
''
C
''
is
a
specified
constant
(
note
that
for
nontrivial
cases
two
such
points
''
p
''
satisfy
the
criteria
,
and
the
resultant
curve
has
two
parts
).
Curves