permanent hardness

noun

chem hardness of water that cannot be removed by boiling as it results mainly from the presence of calcium and magnesium chlorides and sulphates

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anchorite
a granular metamorphic rock.
a person who has retired to a solitary place for a life of religious seclusion.
a hobble or fetter for a horse or other animal.
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Words nearby permanent hardness

permanent, permanent cartilage, permanent court of arbitration, permanent dentition, permanent echo, permanent hardness, permanent health insurance, permanent magnet, permanent mold, permanent press, permanent resident
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