plan·e·tes·i·mal 
(plăn′ĭ-tĕsə-məl)
(plăn′ĭ-tĕsə-məl)n.
Any of innumerable small bodies thought to have orbited the sun during the formation of the planets.
[PLANET + (INFINIT)ESIMAL.]
plan′e·tesi·mal adj.
| 单词 | planetesimal |
| 释义 | plan·e·tes·i·mal (plăn′ĭ-tĕsə-məl)n. Any of innumerable small bodies thought to have orbited the sun during the formation of the planets. [PLANET + (INFINIT)ESIMAL.] plan′e·tesi·mal adj. |
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