D defs.my
Entry 2 senses Webster, 1913

Planet

/plăn'-ət/ · Plan·et · IPA /ˈplænət/
01 n. 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 abs…
  1. 1.
    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.(Astron.) See: Solar system
  2. 2.
    A star, as influencing the fate of a men.
    “There's some ill planet reigns.” Shak.
Phrases & compounds
Planet gear — See Epicyclic train, under Epicyclic.
Planet wheel — a gear wheel which revolves around the wheel with which it meshes, in an epicyclic train.