Where does “orthopantomogramme” come from?

orthopantomogramme (French) comes from French ortho-, from Ancient Greek ὀρθός, from Proto-Hellenic ortʰwós, from Proto-Indo-European h₃r̥dʰwós, from Proto-Indo-European h₃erdʰ-, from Proto-Indo-European -wós — Creates adjectives from verb stems.

orthopantomogramme (French): orthopantomogram

Definitions

orthopantomogram

Ancestry of “orthopantomogramme”, step by step

Step	Language	Word	Meaning
1	French	ortho-	right
2	Ancient Greek	ὀρθός	straight, upright, erect; straight forward, in a...
3	Proto-Hellenic	ortʰwós	—
4	Proto-Indo-European	h₃r̥dʰwós	—
5	Proto-Indo-European	h₃erdʰ-	to increase, grow; upright, high
6	Proto-Indo-European	-wós	Creates adjectives from verb stems

Every word from Proto-Indo-European -wós →Every word from Proto-Indo-European h₃erdʰ- →Every word from Proto-Indo-European h₃r̥dʰwós →