parallels 音标拼音: [p'ɛrəl
, ɛlz]
垫铁
垫铁
Parallel \
Par "
al *
lel \,
a . [
F .
parall [`
e ]
le ,
L .
parallelus ,
fr .
Gr . ?;
para `
beside ?
of one another ,
fr . ?
other ,
akin to L .
alius .
See {
Alien }.]
1 . (
Geom .)
Extended in the same direction ,
and in all parts equally distant ;
as ,
parallel lines ;
parallel planes .
[
1913 Webster ]
Revolutions . . .
parallel to the equinoctial .
--
Hakluyt .
[
1913 Webster ]
Note :
Curved lines or curved planes are said to be parallel when they are in all parts equally distant .
[
1913 Webster ]
2 .
Having the same direction or tendency ;
running side by side ;
being in accordance (
with );
tending to the same result ; --
used with to and with .
[
1913 Webster ]
When honor runs parallel with the laws of God and our country ,
it can not be too much cherished .
--
Addison .
[
1913 Webster ]
3 .
Continuing a resemblance through many particulars ;
applicable in all essential parts ;
like ;
similar ;
as ,
a parallel case ;
a parallel passage . --
Addison .
[
1913 Webster ]
{
Parallel bar }.
(
a ) (
Steam Eng .)
A rod in a parallel motion which is parallel with the working beam .
(
b )
One of a pair of bars raised about five feet above the floor or ground ,
and parallel to each other , --
used for gymnastic exercises .
{
Parallel circles of a sphere },
those circles of the sphere whose planes are parallel to each other .
{
Parallel columns },
or {
Parallels } (
Printing ),
two or more passages of reading matter printed side by side ,
for the purpose of emphasizing the similarity or discrepancy between them .
{
Parallel forces } (
Mech .),
forces which act in directions parallel to each other .
{
Parallel motion }.
(
a ) (
Mach .)
A jointed system of links ,
rods ,
or bars ,
by which the motion of a reciprocating piece ,
as a piston rod ,
may be guided ,
either approximately or exactly in a straight line . --
Rankine .
(
b ) (
Mus .)
The ascending or descending of two or more parts at fixed intervals ,
as thirds or sixths .
{
Parallel rod } (
Locomotive Eng .),
a metal rod that connects the crank pins of two or more driving wheels ; --
called also {
couping rod },
in distinction from the connecting rod .
See Illust .
of {
Locomotive },
in App . -- {
Parallel ruler },
an instrument for drawing parallel lines ,
so constructed as to have the successive positions of the ruling edge parallel to each other ;
also ,
one consisting of two movable parts ,
the opposite edges of which are always parallel .
{
Parallel sailing } (
Naut .),
sailing on a parallel of latitude .
{
Parallel sphere } (
Astron . &
Geog .),
that position of the sphere in which the circles of daily motion are parallel to the horizon ,
as to an observer at either pole .
{
Parallel vise },
a vise having jaws so guided as to remain parallel in all positions .
[
1913 Webster ]
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