noun ·Rare ·Advanced level

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

Synonyms

All synonyms

fireballmeteormicrometeormicrometeoroidradiantshooting star

Etymology

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

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.