Where does “megaterium” come from?

megaterium (Latin) comes from Latin bacterium, from Ancient Greek βακτήριον, from Ancient Greek βακτηρία, from Proto-Indo-European baḱ- — club, pointed stick, peg; pointed stick, peg.

megaterium (Latin): A specific epithet for a bacterium used as a soil inoculant in agriculture and horticulture/

Definitions

A specific epithet for a bacterium used as a soil inoculant in agriculture and horticulture/

Ancestry of “megaterium”, step by step

Step	Language	Word	Meaning
1	Latin	bacterium	cane, walking-stick; staff (of a shepherd)
2	Ancient Greek	βακτήριον	Synonym of βακτηρία
3	Ancient Greek	βακτηρία	rod, staff, cane; baton
4	Proto-Indo-European	baḱ-	club, pointed stick, peg; pointed stick, peg

Every word from Proto-Indo-European baḱ- →Every word from Ancient Greek βακτηρία →Every word from Ancient Greek βακτήριον →