hordeolum

from WordNet (r) 3.0 (2006)

hordeolum
    n 1: an infection of the sebaceous gland of the eyelid [syn:
         {sty}, {stye}, {hordeolum}, {eye infection}]

from 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]