Webster's Revised Unabridged Dictionary · 1913

Xeronic

Xeronic , adjective

[Greek xhro`s dry + citraconic.]

(Chemistry) Pertaining to, or designating, an acid, C8H12O4, related to fumaric acid, and obtained from citraconic acid as an oily substance having a bittersweet taste; -- so called from its tendency to form its anhydride.