ETYMOLOGY
from Latin rabiosus (rabid, mad, frenzied, furious), from rabies (rabies) + –osus (-ous)
EXAMPLE
“… Ethelred, languishing in minde and body, Edmond his sonne, surnamed Ironside (to oppose youth to youth) was imployed against this rabious inuador. A Prince worthy of a better time, and had he found faith, had made it so, and deliuered his country at that turne, from the worst of miseries, the conquest by strangers. …”
From: The First Part of the Historie of England
By Samuel Daniel, 1612
Lexicophilia 