Definition of allopalladium in English:

allopalladium

Pronunciation /ˌaləpəˈleɪdɪəm/

noun

rare Mineralogy
  • A silver-grey mineral containing palladium and other elements, originally thought to be an impure allotrope of palladium and now identified with stibiopalladinite.

Origin

Mid 19th century; earliest use found in James Dana (1813–1895), geologist, zoologist, and teacher. From allo- + palladium.