Source : Webster's Revised Unabridged Dictionary (1913)

Esophagus \E*soph"a*gus\, n. [NL., fr. Gr. o'isofa`gos; root of
   o'i`sw which is used as future of fe`rein to bear, carry (cf.
   Skr. v[=i] to go, drive) + fagei^n to eat.] (Anat.)
   That part of the alimentary canal between the pharynx and the
   stomach; the gullet. See Illust. of {Digestive apparatus},
   under {Digestive}. [Written also {[oe]sophagus}.]

Source : WordNet®

esophagus
     n : the passage between the pharynx and the stomach [syn: {oesophagus},
          {gorge}, {gullet}]
     [also: {oesophagi} (pl), {esophagi} (pl)]