Late 19th century; earliest use found in The Century Dictionary. From ancient Greek πυρρός reddish (from the same Indo-European base as ancient Greek πῦρ fire: see pyro-) + -ous.
Definition of pyrrhous in US English:
pyrrhous
adjectiveˈpɪrəs
rare
Reddish; ruddy.
Origin
Late 19th century; earliest use found in The Century Dictionary. From ancient Greek πυρρός reddish (from the same Indo-European base as ancient Greek πῦρ fire: see pyro-) + -ous.