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collophane

[ kol-uh-feyn ]

noun

, Mineralogy.
  1. a massive, cryptocrystalline variety of apatite that is the principal component of phosphate rock and fossil bone.


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Word History and Origins

Origin of collophane1

1915–20; < German Kollophan, equivalent to Greek koll(a) glue + -o- -o- + -phan -phane ( def )

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