Examples are automatically compiled from online sources to show current usage.Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Noun
When organisms died and were buried in this sediment fan, the high iron content triggered the precipitation of the mineral siderite around their decaying bodies, locking them inside hard geological nodules.—Jacek Krywko, ArsTechnica, 10 Apr. 2026 Here, the rover’s chemistry and mineralogy instrument has discovered lots of the iron-rich carbonate mineral siderite.—Elisabeth M. Hausrath, The Conversation, 6 May 2025 Two years later, the Philippines’ Atomic Energy Commission contributed a siderite, a nickel-iron meteorite.—IEEE Spectrum, 1 Oct. 2023 Scientists found the proto-spider frozen in the mineral siderite (no, not carbonite) in England and used an X-ray version of a CT scan to image it.—Discover Magazine, 29 June 2010