Definition of cometoid in English:

cometoid

Pronunciation /ˈkɒmɪtɔɪd/

noun

Astronomy
  • 1historical, rare D. Kirkwood's name for: a luminous meteor (having an orbit like that of a comet).

  • 2Any of various celestial objects resembling a comet or cometary nucleus.

Origin

Early 19th century (in an earlier sense). From comet + -oid.