Where does “oftalmometria” come from?

oftalmometria (Italian) comes from Italian -metria, from Latin -metria, from Ancient Greek -μετρία, from Ancient Greek -ῐ́ᾱ, from Proto-Indo-European -íh₂, from Proto-Indo-European -h₂ — Creates collective nouns, which refer to groups...

oftalmometria (Italian): ophthalmometry

Definitions

ophthalmometry

Ancestry of “oftalmometria”, step by step

Step	Language	Word	Meaning
1	Italian	-metria	-metry
2	Latin	-metria	-metry
3	Ancient Greek	-μετρία	measurement
4	Ancient Greek	-ῐ́ᾱ	{{l\|en\|-ia}}; "suffix forming abstract feminine...
5	Proto-Indo-European	-íh₂	—
6	Proto-Indo-European	-h₂	Creates collective nouns, which refer to groups...

Every word from Proto-Indo-European -h₂ →