Source : Webster's Revised Unabridged Dictionary (1913)

Leptorhine \Lep"to*rhine\ (l[e^]p"t[-o]*r[imac]n or *r[i^]n), a.
   [Gr. lepto`s small + "ri`s, "rino`s, the nose.] (Anat.)
   Having the nose narrow; -- said esp. of the skull. Opposed to
   {platyrhine}.

Source : WordNet®

leptorhine
     adj : having a long narrow nose [syn: {leptorrhine}, {leptorrhinian},
            {leptorrhinic}] [ant: {catarrhine}, {platyrrhine}]