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Noun: planetesimal  `plani'tesumul
  1. One of many small solid celestial bodies thought to have existed at an early stage in the development of the solar system

Derived forms: planetesimals

Type of: celestial body, heavenly body

Encyclopedia: Planetesimal

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planetesimal hypothesis
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plane-tree family
plangency
plangent
planimeter
planing machine
planish
planisphere