e·soph·a·gus also oe·soph·a·gus (ĭ-sŏf'ə-gəs) n.
pl.e·soph·a·gi also oe·soph·a·gi (-jī', -gī') The muscular membranous tube for the passage of food from the pharynx to the stomach; the gullet.
[Middle English isophagus, from Medieval Latin ēsophagus, from Greek oisophagos, arbitrary medical coinage perhaps from ois- : future tense stem of pherein, to carry + -phagos, food (unattested sense) (from phagein, to eat; see bhag- in Indo-European roots).] e·soph'a·ge'al (-jē'əl) adj.