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Webster's 1828 Dictionary

PHOSPHORITE

n.A species of calcarious earth; a subspecies of apatite.

Webster's 1913 Dictionary

PHOSPHORITE

PHOSPHORITE Phos "phor *ite, n.

Defn: (min. ) A massive variety of apatite.

New American Oxford Dictionary

phosphorite

phos pho rite |ˈfäsfəˌrīt ˈfɑsfəraɪt | ▶noun a sedimentary rock containing a high proportion of calcium phosphate. ORIGIN late 18th cent.: from phosphorus + -ite 1 .

Oxford Dictionary

phosphorite

phosphorite |ˈfɒsfərʌɪt | ▶noun [ mass noun ] a sedimentary rock containing a high proportion of calcium phosphate. ORIGIN late 18th cent.: from phosphorus + -ite 1 .