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The Collaborative International Dictionary of English v.0.48 (gcide)

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.
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Note: Curved lines or curved planes are said to be parallel
when they are in all parts equally distant.
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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.
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When honor runs parallel with the laws of God and
our country, it can not be too much cherished.
--Addison.
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3. Continuing a resemblance through many particulars;
applicable in all essential parts; like; similar; as, a
parallel case; a parallel passage. --Addison.
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{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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