hordeolum

from The Century Dictionary.

• noun In pathology, a sty or small inflammatory tumor on the edge of the eyelid.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Med.) A small tumor upon the eyelid, resembling a grain of barley; a sty.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun stye, sty. An infection of a sebaceous gland of the eyelid. This is distinguished from a chalazion, which is not infected, but a cyst formed from an impacted meibomian gland of the eyelid.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun an infection of the sebaceous gland of the eyelid