Where does “Rubidiumhydroxid” come from?

Rubidiumhydroxid (German) comes from German Rubidium, from Latin rubidus, from Latin -idus, from Proto-Italic *-iðos.

Rubidiumhydroxid (German): rubidium hydroxide

Definitions

Step	Language	Word	Meaning
1	German	Rubidium	rubidium
2	Latin	rubidus	red
3	Latin	-idus	tending to
4	Proto-Italic	*-iðos	—

Rubidiumhydroxid — Etymology, Origin & Word History | Etymology Explorer