vicenarian/ˌvɪs.əˈnɛəɹ.i.ən/EtymologyFrom vicenary + -ian, from Latin vīcēnārius (“vicenary”), from vīcēnus (“twenty each”) + -ārius (“-ary: forming adjectives and related nouns”).vicenarian means A person whose age is between twenty and twenty-nine years, inclusive; someone in their twenties. Lexicurio rates it Sui generis — a strength score of 87 out of 100.nounA person whose age is between twenty and twenty-nine years, inclusive; someone in their twenties.“Melissa is a vicenarian at twenty-one years of age and a hairdresser.”