Word Study
Vagus
CIDE DICTIONARY
Vagus, a. [L., wandering.].
Wandering; -- applied especially to the pneumogastric nerve. [1913 Webster]
OXFORD DICTIONARY
Vagus, n. (pl. vagi) Anat. either of the tenth pair of cranial nerves with branches to the heart, lungs, and viscera.
Derivative
vagal adj.
Etymology
L: see VAGUE
For further exploring for "Vagus" in Webster Dictionary Online