noun, plural ra·rae a·ves [rair-ee ey-veez; Latin rah-rahy ah-wes] /ˈrɛər i ˈeɪ viz; Latin ˈrɑ raɪ ˈɑ wɛs/.
Origin of rara avis
British Dictionary definitions for rara avis
noun plural rarae aves (ˈrɛəriː ˈeɪviːz)
Word Origin for rara avis
Word Origin and History for rara avis
c.1600, "peculiar person," from Latin rara avis, literally "strange bird," from rara, fem. of rarus "rare" (see rare (adj.1)) + avis "bird" (see aviary). Latin plural is raræ aves. Horace's peacock (a Roman delicacy), Juvenal's black swan ("Rara avis in terris, nigroque simillima cygno").