25B6; noun RARITY, rare bird, wonder, marvel, nonpareil, nonsuch, one of a kind; curiosity, oddity, freak; Brit. informal one-off.
RARA AVIS
Meaning of RARA AVIS in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012