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coffinite

[kaw-fi-nahyt, kof-i-]
noun
  1. a mineral, black uranous silicate, USiO4, an important ore of uranium.
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Origin of coffinite

First recorded in 1950–55; coffin + -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018