Where does “astrofotometro” come from?

astrofotometro (Italian) comes from Italian fotometro, from Italian foto-, from Ancient Greek φωτο-, from Ancient Greek φῶς, from Proto-Hellenic pʰáos, from Proto-Indo-European bʰéh₂os, from Proto-Indo-European bʰeh₂-, from Proto-Indo-European bʰeh₂-s-ri-.

astrofotometro (Italian): astrophotometer

Definitions

astrophotometer

Ancestry of “astrofotometro”, step by step

Step	Language	Word	Meaning
1	Italian	fotometro	photometer; exposure meter
2	Italian	foto-	photo-
3	Ancient Greek	φωτο-	—
4	Ancient Greek	φῶς	Attic form of φᾰ́ος
5	Proto-Hellenic	pʰáos	—
6	Proto-Indo-European	bʰéh₂os	—
7	Proto-Indo-European	bʰeh₂-	to shine, glow light; to speak, say
8	Proto-Indo-European	bʰeh₂-s-ri-	—

Every word from Proto-Indo-European bʰeh₂-s-ri- →Every word from Proto-Indo-European bʰeh₂- →Every word from Ancient Greek φωτο- →