• Webster's Revised Unabridged Dictionary
    • n Tachhydrite (Min) A hydrous chloride of calcium and magnesium occurring in yellowish masses which rapidly deliquesce upon exposure. It is found in the salt mines at Stassfurt.
    • ***
Century Dictionary and Cyclopedia
    • n tachhydrite A massive mineral of yellowish color found in the salt-mines of Stassfurt in Prussia. It is a hydrous chlorid of calcium and magnesium: named in allusion to its rapid deliquescence on exposure to the air and water.
    • ***


Webster's Revised Unabridged Dictionary
Gr. tachy`s quick + "y`dwr water. So named from its ready deliquescence