Definition of plenargyrite in English:

plenargyrite

noun

Mineralogy
rare
  • A mineral consisting of a sulphide of silver and bismuth, AgBiS₂, that is a paramorph of matildite.

Origin

Late 19th century; earliest use found in The Century Dictionary. From German Plenargyrit, apparently from classical Latin plēnus full + ancient Greek ἄργυρος silver + German -it, after Miargyrit.

Pronunciation

plenargyrite

/plɪˈnɑːdʒɪrʌɪt/