English
protostellar
From proto- + stellar.
Proto-Indo-European *pér ‘through’
Proto-Indo-European *pró ‘forwards, before’
Proto-Hellenic *pró
Ancient Greek πρό ‘before’
Ancient Greek πρῶτος ‘first’
English proto-
Proto-Indo-European *h₂eHs- ‘to be dry, to dry’
Proto-Indo-European *h₂stḗr ‘star’
Proto-Italic *stērlā ‘star’
Latin stēlla ‘a star’
Latin stēllāris ‘of or pertaining to a star’
English stellar
Today it means
adj Of or pertaining to a protostar.
Language periods are conventional ranges, not dates for this word.
Etymograph / protostellar