ironstone

[ahy-ern-stohn]
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noun

any iron-bearing mineral or rock with siliceous impurities.
Also called ironstone china. a hard white stoneware.

Origin of ironstone

First recorded in 1515–25; iron + stone
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for ironstone

ironstone

noun

any rock consisting mainly of an iron-bearing ore
Also called: ironstone china a tough durable earthenware
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012