planetesimal

play
noun plan·e·tes·i·mal \ˌpla-nə-ˈte-sə-məl, -zə-məl\

Definition of planetesimal

  1. :  any of numerous small celestial bodies that may have existed at an early stage of the development of the solar system

Origin and Etymology of planetesimal

planet + -esimal (as in infinitesimal)


First Known Use: 1903


Learn More about planetesimal


Seen and Heard

What made you want to look up planetesimal? Please tell us where you read or heard it (including the quote, if possible).