Merriam-Webster's Collegiate® Dictionary, 11th Edition
noun
Usage: often capitalized
Etymology: Middle English pharao, from Old English, from Late Latin pharaon-, pharao, from Greek pharaō, from Hebrew par‘ōh, from Egyptian pr-‘? Date: before 12th century a ruler of ancient Egypt, tyrant
Merriam-Webster's Collegiate® Dictionary, 11th Edition
pharaoh ant
noun
Date: circa 1947
a small red ant ( Monomorium pharaonis ) that is a common household pest