vagusPronunciation: /ˈveɪgəs/Definition of vagus noun (plural vagi /-dʒʌɪ, -gʌɪ/) (also vagus nerve) Anatomy each of the tenth pair of cranial nerves, supplying the heart, lungs, upper digestive tract, and other organs of the chest and abdomen. Origin: mid 19th century: from Latin (see vague)vagus in other Oxford dictionaries Definition of vagus in the US English dictionary
