The Collaborative International Dictionary
Hydrocarbonate
Hydrocarbonate \Hy`dro*car"bon*ate\, n.
(Old Chem.) A hydrocarbon. [Obs.]
(Chem.) A hydrous carbonate, as malachite.
Wiktionary
hydrocarbonate
n. 1 (context chemistry obsolete English) A hydrocarbon. 2 (context chemistry obsolete English) A hydrous carbonate, such as malachite.