pert. to homicide; tending to or resulting in homicide; man-slaying; murderous ...1632 rare
from Latin homicidium homicide, the act of killing a human being + -ous
FIRST DOCUMENTED USE
1632 - see EXAMPLE below
"...An inhumane and homicidious Pope was Stephanus the seventh ..."
From: The Totall Discourse, Of the Rare Adventures, and painefull Peregrinations of long nineteene Yeares Travayles,
From Scotland, to the Most Famous Kingdomes
in Europe, Asia, and Affrica.
By: William Lithgow, 1632
• A New English Dictionary on Historical Principles,
James Murray, 1887-1933