1. (noun)vagus, vagus nerve, nervus vagus, pneumogastric, pneumogastric nerve, tenth cranial nerve, wandering nerve a mixed nerve that supplies the pharynx and larynx and lungs and heart and esophagus and stomach and most of the abdominal viscera Synonyms: vagus, vagus nerve, pneumogastric nerve, wandering nerve, tenth cranial nerve, nervus vagus, pneumogastric