plagiocitrite
/ˌpleɪdʒɪə(ʊ)ˈsɪtrʌɪt/Mineralogy. Now historical and rare
noun
An iron aluminosulphate mineral of uncertain identity, described from microscopic yellow crystals found in southern Germany.
Origin
Late 19th century; earliest use found in The Encyclopedic Dictionary. From plagio- + classical Latin citrus + -ite, after German Plagiocitrit (S. Singer Beitr. zur Kenntniss der am Bauersberge bei Bischofsheim vor der Rhön vorkommenden Sulfate (dissertation, Würzburg) 13).