sty

Sty \Sty\, n. [For older styan, styanye, understood as sty on eye, AS. st[=i]gend (sc. e['a]ge eye), properly, rising, or swelling (eye), p. p. of st[=i]gan to rise. See {Sty}, v. i.] (Med.) An inflamed swelling or boil on the edge of the eyelid. [Written also {stye}.] [1913 Webster]