• Webster's Revised Unabridged Dictionary
    • n Thiocarbonate (Chem) A sulphocarbonate.
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Century Dictionary and Cyclopedia
    • n thiocarbonate In chem., a compound derived from the union of carbon disulphid with the monosulphid of a strongly electropositive metal or radical: as, potassium thiocarbonate, K2CS3, analogous to potassium carbonate. K2CO3, but containing sulphur in place of oxygen. This salt has been used in the treatment of vines infested by the Phylloxera. Formerly called sulphocyanate, a term now applied to a salt of analogous character, but in which only one third of the oxygen of a carbonate is replaced by sulphur.
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In literature:

In 1892, Cross and Bevan patented the preparation of a new and curious compound of cellulose, the thiocarbonate (1) (2) (3).
"Researches on Cellulose" by C. F. Cross