Where does “galvanotonus” come from?

galvanotonus (English) comes from English galvano-, from Italian Galvani, from Italian -i, from Latin -i, from Latin -ēs, from Proto-Indo-European h₁éy- — he, this.

galvanotonus (English): electrotonus

Definitions

electrotonus

Ancestry of “galvanotonus”, step by step

Step	Language	Word	Meaning
1	English	galvano-	electricity or galvanism
2	Italian	Galvani	—
3	Italian	-i	Used with a stem to form the second-person...
4	Latin	-i	nominative/vocative masculine plural of -us;...
5	Latin	-ēs	first conjugation
6	Proto-Indo-European	h₁éy-	he, this

Every word from Proto-Indo-European h₁éy- →Every word from Latin -ēs →Every word from English galvano- →