The Collaborative International Dictionary of English v.0.48:

Redeye \Red"eye`\ (r[e^]d"[imac]`), n.
   1. (Zool.)
      (a) The rudd.
      (b) Same as Redfish
      (d) .
      (c) The goggle-eye, or fresh-water rock bass. [Local,
          U.S.]
          [1913 Webster]

   2. A scheduled public conveyance, such as a train or
      airplane, which travels late at night or overnight.
      [Colloq.]
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Rudd \Rudd\, n. [See Rud, n.] (Zool.)
   A fresh-water European fish of the Carp family (Leuciscus
   erythrophthalmus). It is about the size and shape of the
   roach, but it has the dorsal fin farther back, a stouter
   body, and red irises. Called also redeye, roud,
   finscale, and shallow. A blue variety is called
   azurine, or blue roach.
   [1913 Webster]

WordNet (r) 3.0 (2006):

redeye
    n 1: a night flight from which the passengers emerge with eyes
         red from lack of sleep; "he took the redeye in order to get
         home the next morning" [syn: redeye, redeye flight]