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Dictionary

sid•er•ite

Pronunciation: (sid'u-rīt"), [key]
—n.
1. Also called chalybite. a common mineral, iron carbonate, FeCO₃, usually occurring in yellowish to deep-brown cleavable masses: a minor ore of iron.
2. a meteorite consisting almost entirely of metallic minerals.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

sidereal year

sidero-

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