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词汇 needle-ironstone
释义

Definition of needle-ironstone in English:

needle-ironstone

noun
historical
  • A variety of goethite (hydrated iron oxide) occurring as needle-shaped crystals.

Origin

Mid 19th century; earliest use found in James Dana (1813–1895), geologist, zoologist, and teacher.

Definition of needle-ironstone in US English:

needle-ironstone

noun
historical
  • A variety of goethite (hydrated iron oxide) occurring as needle-shaped crystals.

Origin

Mid 19th century; earliest use found in James Dana (1813–1895), geologist, zoologist, and teacher.

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