The Collaborative International Dictionary
Nonagrian
Nonagrian \Non*a"gri*an\, n. [Etymol. uncertain.] (Zo["o]l.) Any moth of the genus Nonagria and allied genera, as the spindleworm and stalk borer.
Wiktionary
nonagrian
n. (context zoology English) Any one of the moths of the genus (taxlink Nonagria genus).