Definition of phosphor-roesslerite in US English:

phosphor-roesslerite

(also phosphoroesslerite, phosphorrösslerite)

noun

Mineralogy
  • A mineral of the monoclinic crystal system which consists of a hydrated acid phosphate of magnesium, MgH(PO₄).7H₂O, is isomorphous with roesslerite, and occurs as white or yellowish crystals that lose water on exposure to air.

Origin

1930s; earliest use found in Mineralogical Abstracts. Blend of phosphorus and rösslerite, after German Phosphorrösslerit.

Pronunciation

phosphor-roesslerite

/ˌfɒsfəˈrəːslərʌɪt/