Emily Dickinson Lexicon

UL'MIC-AC'ID, n. [UL'MIC AC'ID. L. ulmus, an elm.]

A vegetable acid, exsuding spontaneously from the elm, the chestnut, the oak, and various other trees. It is a dark brown, and nearly black solid, insipid, inodorous, and very sparingly soluble in water and alcohol. It constitutes the essential ingredient of peat, etc. It appears to constitute what is usually called vegetable manure. Th. Thomson. Turner.