Where does “radiobismuth” come from?

radiobismuth (English) comes from English bismuth, from German Wismut, from Middle High German wismāt, from Latin bisemutum, from Arabic بِسِيمُوتِيُّون, from Ancient Greek ψιμύθιον, from Ancient Greek -ῐον, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

radiobismuth (English): Any radioactive isotope of bismuth, especially...

Definitions

Any radioactive isotope of bismuth, especially...

Ancestry of “radiobismuth”, step by step

Step	Language	Word	Meaning
1	English	bismuth	A chemical element with an atomic number of 83:...
2	German	Wismut	bismuth
3	Middle High German	wismāt	—
4	Latin	bisemutum	bismuth
5	Arabic	بِسِيمُوتِيُّون	—
6	Ancient Greek	ψιμύθιον	white lead (as a pigment to whiten the face or hair)
7	Ancient Greek	-ῐον	diminutive suffix; "suffix forming...
8	Proto-Indo-European	-yós	Creates adjectives from noun or verb stems

Every word from Proto-Indo-European -yós →Every word from Ancient Greek -ῐον →Every word from Ancient Greek ψιμύθιον →