Plăn'et-a-ry, a.

a. [Lat. planetarius, It. & Sp. planetario, Fr. planétaire. See PLANET.]

1. Pertaining to the planets; as, planetary inhabitants; planetary motions.
2. Consisting of planets; as, a planetary system.
3. (Astrol.) Under the dominion or influence of a planet; as, a planetary hour. Dryden.
4. Produced by planets; as, planetary plague or influence. Shak.
5. Having the nature of a planet; erratic, or revolving. Blackmore.

Planetary days, the days of the week as shared among the planets, each having its day, as we name the days of the week after the planets. Hutton. — Planetary nebula, a nebula exhibiting a uniform disk, like that of a planet, and not resolvable into stars.