What student came but that you planed her path.
Tennyson.
Plane`-par"al*lel (?), a. (Optics) Having opposite surfaces exactly
plane and parallel, as a piece of glass.
Plan"er (?), n. 1. One who, or that which, planes; a planing machine;
esp., a machine for planing wood or metals.
2. (Print.) A wooden block used for forcing down the type in a form,
and making the surface even. Hansard.
Planer centers. See under Center.
Plan"er tree` (?). [From J. S. Planer, a German botanist.] (Bot.) A
small-leaved North American tree (Planera aquatica) related to the elm,
but having a wingless, nutlike fruit.
Plan"et (?), n. [OE. planete, F. planËte, L. planeta, fr. Gr. &?;, and
&?; a planet; prop. wandering, fr. &?; to wander, fr. &?; a wandering.]
1. (Astron.) A celestial body which revolves about the sun in an orbit
of a moderate degree of eccentricity. It is distinguished from a comet
by the absence of a coma, and by having a less eccentric orbit. See
Solar system.
The term planet was first used to distinguish those stars which have an
apparent motion through the constellations from the fixed stars, which
retain their relative places unchanged. The inferior planets are
Mercury and Venus, which are nearer to the sun than is the earth; the
superior planets are Mars, the asteroids, Jupiter, Saturn, Uranus, and
Neptune, which are farther from the sun than is the earth. Primary
planets are those which revolve about the sun; secondary planets, or
moons, are those which revolve around the primary planets as
satellites, and at the same time revolve with them about the sun.