| 单词 | planetary |
| 释义 | planetary /plan"i ter'ee/, adj. 1. of, pertaining to, or resembling a planet or the planets. 2. wandering; erratic. 3. terrestrial; global. 4. Mach. 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. n. 5. Mach. a planetary gear train. [1585-95; < L planetarius. See PLANET, -ARY] |
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