The Collaborative International Dictionary of English v.0.48:
Hordeolum \Hor*de"o*lum\, n. [NL., fr. L. hordeolus, dim. of hordeum barley.] (Med.) A small tumor upon the eyelid, resembling a grain of barley; a sty. [1913 Webster]WordNet (r) 3.0 (2006):
hordeolum n 1: an infection of the sebaceous gland of the eyelid [syn: sty, stye, hordeolum, eye infection]