rara avis
UK /ˌɹɑːɹə ˈeɪvɪs/ · US /ˌɹɑɹə ˈeɪvɪs/ noun
Forms rara avises rarae aves raræ aves
- noun A rare species or type of bird.
- noun (figuratively) A rare or unique, and thus outstanding or unusual, person or thing; a rare bird. “That Parsons girl is quite the rara avis if you ask me.”
Synonyms
rarity black swan hen's tooth lightning in a bottle one in a million rare bird rocking horse shit unicorn
Etymology
Unadapted borrowing from Latin rāra avis (“rare bird”). The synonym rare bird is attested earlier. The term is a quotation from Satire VI (written late 1st century – early 2nd century C.E.) of the Roman poet Juvenal: “Rara avis in terris, nigroque simillima cygno [a bird as rare upon the earth as a black swan]!”.
The plural form rarae aves is a learned borrowing from Latin rārae avēs.
Sources: Wiktionary — from the Wiktionary entry “rara avis”, CC BY-SA 4.0. Details