bunyon
Bun"yon, Bun"ion, n. Etym: [Cf. Prov. E. bunny a small swelling, fr. OF. bugne, It. bugna, bugnone. See Bun.] (Med.) Defn: An enlargement and inflammation of a small membranous sac (one of the bursæ muscosæ), usually occurring on the first joint of the great toe.