redeye

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Informal A late-night or overnight flight.
• noun Any of several fishes with red eyes, as the rock bass.
• noun A coloration of the pupils in a color photograph, red in humans and varying in color in animals, caused by the reflection of the flash off the retina or tapetum.
• noun Slang Inferior whiskey.

from The Century Dictionary.

• noun A cyprinoid fish, Leuciscus erythrophthalmus, having a red iris; the rudd.
• noun The Blue-spotted sunfish, Lepomis cyanellus.
• noun The rock-bass, Ambloplites rupestris. See cut under rock-bass.
• noun The red-eyed vireo or greenlet, Vireo olivaceus, having the iris red. See cut under greenlet.
• noun A strong and fiery whisky: so called from its effect upon the eyes of drinkers.
• noun The blue-green sunfish.
• noun A species of European chubb, Scardinius erythrophthalmus.

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

• noun Local, U.S., Local, U.S. The rudd.
• noun Local, U.S., Local, U.S. Same as redfish (d).
• noun Local, U.S. The goggle-eye, or fresh-water rock bass.
• noun colloq. A scheduled public conveyance, such as a train or airplane, which travels late at night or overnight.

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

• noun uncountable The effect in a photograph taken with flash of a subject's eyes appearing red due to the reflection of light from the blood vessels in the retina
• noun Alternative spelling of red-eye.
• adjective Alternative spelling of red-eye.

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

• verb travel on an overnight flight
• noun a night flight from which the passengers emerge with eyes red from lack of sleep