parabolical
a . 譬喻;寓言似的
譬喻;寓言似的
parabolical adj 1 :
resembling or expressed by parables [
synonym : {
parabolic },
{
parabolical }]
2 :
having the form of a parabola [
synonym : {
parabolic },
{
parabolical }]
Parabolic \
Par `
a *
bol "
ic \,
Parabolical \
Par `
a *
bol "
ic *
al \,
a . [
Gr .
paraboliko `
s figurative :
cf .
F .
parabolique .
See {
Parable }.]
[
1913 Webster ]
1 .
Of the nature of a parable ;
expressed by a parable or figure ;
allegorical ;
as ,
parabolical instruction .
[
1913 Webster ]
2 . [
From {
Parabola }.] (
Geom .)
(
a )
Having the form or nature of a parabola ;
pertaining to ,
or resembling ,
a parabola ;
as ,
a parabolic curve .
(
b )
Having a form like that generated by the revolution of a parabola ,
or by a line that moves on a parabola as a directing curve ;
as ,
a parabolic conoid ;
a parabolic reflector ;
a parabolic antenna .
[
1913 Webster PJC ]
{
Parabolic conoid },
a paraboloid ;
a conoid whose directing curve is a parabola .
See {
Conoid }.
{
Parabolic mirror } (
Opt .),
a mirror having a paraboloidal surface which gives for parallel rays (
as those from very distant objects )
images free from aberration .
It is used in reflecting telescopes .
{
Parabolic spindle },
the solid generated by revolving the portion of a parabola cut off by a line drawn at right angles to the axis of the curve ,
about that line as an axis .
{
Parabolic spiral },
a spiral curve conceived to be formed by the periphery of a semiparabola when its axis is wrapped about a circle ;
also ,
any other spiral curve having an analogy to the parabola .
[
1913 Webster ]
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