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noun
MineralogyAn orthorhombic hydrated silicate of aluminium, calcium, sodium, and potassium, which belongs to the zeolite group and usually occurs as white glassy needles, especially in igneous rocks.
Origin
Mid 19th century. From the name of Morden, a community in Kings County, Nova Scotia, where the silicate was discovered + -ite; coined by H. How.
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