| 1. | of, pertaining to, or resembling a planet or the planets. |
| 2. | wandering; erratic. |
| 3. | terrestrial; global. |
| 4. | Machinery. noting or pertaining to an epicyclic gear train in which a sun gear is linked to one or more planet gears also engaging with an encircling ring gear. |
| 5. | Machinery. a planetary gear train. |