adj, noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A very small protoplanet

Adjective

1. 1
   Synonym of protoplanetary. not-comparable

Synonyms

All synonyms

protoplanetary

Etymology

From proto- + planetesimal.

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