vīcēnārĭus — Lewis & Short
vīcēnārĭus, a, um, adj.id.,
I of or belonging to the number twenty, vicenary.
I Adj.:
annorum lex me perdit quina vicenaria: metuunt credere omnes,i. e. the law by which young people under five-and-twenty were incapable of making contracts, Plaut. Ps. 1, 3, 69 (Ritschl, quinavicenaria):
fistula,twenty quarter-digits in diameter, Vitr. 8, 7; Front. Aquaed. 30; Pall. Aug. 12.—
II Subst.: vīcēnārĭus, ii, m., a youth of twenty, Arn. 2, 58.