Where does “holostome” come from?

holostome (English) comes from English holo-, from Ancient Greek ὅλος, from Proto-Indo-European solh₂wós, from Proto-Indo-European sōlh₂- — mercy, comfort; comfort, mercy.

holostome (English): Any of the Holostomata

Definitions

Any of the Holostomata

Ancestry of “holostome”, step by step

Step	Language	Word	Meaning
1	English	holo-	whole; hologram
2	Ancient Greek	ὅλος	whole, entire, perfect, complete; absolute,...
3	Proto-Indo-European	solh₂wós	—
4	Proto-Indo-European	sōlh₂-	mercy, comfort; comfort, mercy

Every word from Proto-Indo-European sōlh₂- →Every word from Proto-Indo-European solh₂wós →Every word from Ancient Greek ὅλος →