vagus
Concise Oxford English Dictionary © 2008 Oxford University Press:
vagus /ˈveɪgəs/
▶noun (pl. vagi /-dʒʌɪ, -gʌɪ/) Anatomy each of the pair of cranial nerves supplying the heart, lungs, and other organs of the chest and abdomen.
'vagus' also found in these Oxford entries:

