Micrometeorite

noun

Definitions

Noun
  1. 1
    an extraterrestrial particle, less than a millimeter in size, that has survived entry into the atmosphere without melting
  2. 2
    a meteorite or meteoroid so small that it drifts down to earth without becoming intensely heated in the atmosphere wordnet

Etymology

From micro- + meteorite (micro- + meteor + -ite).

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