Where does “Firmicutes” come from?

Firmicutes (Translingual) comes from Latin Firmus, from Proto-Italic fermos, from Proto-Indo-European dʰer-mo-s, from Proto-Indo-European dʰer- — to support; to hold.

Firmicutes (Translingual): phylum|i=1}}

Definitions

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Ancestry of “Firmicutes”, step by step

Firmicutes traces back through two separate lines of ancestry.

via Latin Firmus

Step	Language	Word	Meaning
1	Latin	Firmus	strong, powerful
2	Proto-Italic	fermos	—
3	Proto-Indo-European	dʰer-mo-s	holding
4	Proto-Indo-European	dʰer-	to support; to hold

via Latin cutis

Step	Language	Word	Meaning
1	Latin	cutis	living skin; rind, surface; hide, leather
2	Proto-Indo-European	kuH-t-	—
3	Proto-Indo-European	(s)kewH-	to cover, bedeck; cover

Words derived from “Firmicutes”

firmicute

Every word from Proto-Indo-European dʰer- →Every word from Proto-Indo-European dʰer-mo-s →Every word from Proto-Italic fermos →