Par·al·lel a.
 1. Geom. Extended in the same direction, and in all parts equally distant; as, parallel lines; parallel planes.
    Revolutions . . . parallel to the equinoctial.   --Hakluyt.
 Note: ☞ Curved lines or curved planes are said to be parallel when they are in all parts equally distant.
 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.
    When honor runs parallel with the laws of God and our country, it can not be too much cherished.   --Addison.
 3. Continuing a resemblance through many particulars; applicable in all essential parts; like; similar; as, a parallel case; a parallel passage.
 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.
 Side a.
 1. Of or pertaining to a side, or the sides; being on the side, or toward the side; lateral.
    One mighty squadron with a side wind sped.   --Dryden.
 2. Hence, indirect; oblique; collateral; incidental; as, a side issue; a side view or remark.
    The law hath no side respect to their persons.   --Hooker.
 3.  Long; large; extensive. [Obs. or Scot.]
    His gown had side sleeves down to mid leg.   --Laneham.
 Side action, in breech-loading firearms, a mechanism for operating the breech block, which is moved by a lever that turns sidewise.
 Side arms, weapons worn at the side, as sword, bayonet, pistols, etc.
 Side ax, an ax of which the handle is bent to one side.
 Side-bar rule Eng. Law., a rule authorized by the courts to be granted by their officers as a matter of course, without formal application being made to them in open court; -- so called because anciently moved for by the attorneys at side bar, that is, informally. --Burril.
 Side box, a box or inclosed seat on the side of a theater.
    To insure a side-box station at half price.   --Cowper.
 -- Side chain, (a) one of two safety chains connecting a tender with a locomotive, at the sides. (b) Chem. a chain of atoms attached to the main structure of a large molecule, especially of a polymer.
 Side cut, a canal or road branching out from the main one. [U.S.]
 Side dish, one of the dishes subordinate to the main course.
 Side glance, a glance or brief look to one side.
 Side hook Carp., a notched piece of wood for clamping a board to something, as a bench.
 Side lever,  a working beam of a side-lever engine.
 Side-lever engine, a marine steam engine having a working beam of each side of the cylinder, near the bottom of the engine, communicating motion to a crank that is above them.
 Side pipe Steam Engine, a steam or exhaust pipe connecting the upper and lower steam chests of the cylinder of a beam engine.
 Side plane, a plane in which the cutting edge of the iron is at the side of the stock.
 Side posts Carp., posts in a truss, usually placed in pairs, each post set at the same distance from the middle of the truss, for supporting the principal rafters, hanging the tiebeam, etc.
 Side rod. (a) One of the rods which connect the piston-rod crosshead with the side levers, in a side-lever engine. (b) See Parallel rod, under Parallel.
 Side screw Firearms, one of the screws by which the lock is secured to the side of a firearm stock.
 Side table, a table placed either against the wall or aside from the principal table.
 Side tool Mach., a cutting tool, used in a lathe or planer, having the cutting edge at the side instead of at the point.
 Side wind, a wind from one side; hence, an indirect attack, or indirect means. --Wright.