protobacterial

Etymology tree
Proto-Indo-European *per-der.?
Proto-Indo-European *per-der.?
Proto-Indo-European *pér
Proto-Indo-European *-o
Proto-Indo-European *próder.
Ancient Greek πρό (pró)
Ancient Greek -ᾰτος (-ătos)
Ancient Greek πρῶτος (prôtos)
Ancient Greek πρωτο- (prōto-)lbor.
English proto-
Ancient Greek βακτηρία (baktēría)
Proto-Indo-European *-yósder.
Ancient Greek -ῐος (-ĭos)?
Ancient Greek -ιον (-ion)
Ancient Greek βακτήριον (baktḗrion)bor.
New Latin bactēriabor.
English bacteria
Proto-Indo-European *h₂el-der.?
Proto-Italic *-ālis
Latin -ālisbor.
Old French -albor.
▲
Latin -ālis
Old French -elbor.
▲
Latin -ālisbor.
Middle English -al
English -al
English bacterial
English protobacterial
From proto- + bacterial.