The Collaborative International Dictionary
Yernut
Yernut \Yer"nut`\, n. [Cf. Dan. jordn["o]d, Sw. jordn["o]t, earthnut. Cf. Jarnut.] An earthnut, or groundnut. See Groundnut (d) . [Written also yarnut.]
Wiktionary
yernut
n. The earthnut or hawknut