• (n.) Any moth of the genus Nonagria and allied genera, as the spindleworm and stalk borer. • (n.) Any moth of the genus Nonagria and allied genera, as the spindleworm and stalk borer.
Non·a'gri·an noun [ Etymol. uncertain.] (Zoology) Any moth of the genus Nonagria and allied genera, as the spindleworm and stalk borer.