The Collaborative International Dictionary of English v.0.48:

Aquiline \Aq"ui*line\ (?; 277), a. [L. aquilinus, fr. aquila
   eagle: cf. F. aquilin. See Eagle. ]
   1. Belonging to or like an eagle.
      [1913 Webster]

   2. Curving; hooked; prominent, like the beak of an eagle; --
      applied particularly to the nose
      [1913 Webster]

            Terribly arched and aquiline his nose. --Cowper.
      [1913 Webster]

WordNet (r) 3.0 (2006):

aquiline
    adj 1: curved down like an eagle's beak [syn: aquiline,
           hooked]

Moby Thesaurus II by Grady Ward, 1.0:

43 Moby Thesaurus words for "aquiline":
   Roman-nosed, altricial, anserine, anserous, aquiline-nosed, avian,
   avicular, beak-nosed, beak-shaped, beaked, bill-like, bill-shaped,
   billed, birdlike, birdy, clawlike, columbine, crookbilled, crooked,
   crooknosed, dovelike, down-curving, goosy, hamate, hamiform,
   hamulate, hawklike, hooked, hooklike, nesting, nidicolous,
   nidificant, oscine, parrot-nosed, passerine, psittacine, rasorial,
   rhamphoid, rostrate, rostriform, unciform, uncinate, unguiform