ultramicrobacterial

Etymology tree
Proto-Indo-European *h₂el-
Latin ūls
Proto-Indo-European *-teros?
Latin -ter
Old Latin -ād
Latin -ā
Latin ultrābor.
English ultra-
Proto-Indo-European *mey-der.?
Ancient Greek μικρός (mikrós)der.
English micro-
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 microbacterial
English ultramicrobacterial
From ultra- + microbacterial.