undēvīcēsĭmus — Lewis & Short
undēvīcēsĭmus or undēvīgēsĭ-mus, a, um, adj.undeviginti,
I the nineteenth:
anno undevicesimo post ejus mortem,Cic. Sen. 5, 14:
expleto aetatis undevicesimo anno,Quint. 6, praef. § 4; Tac. A. 1, 45 (al. unetvicesimus):
die undevigesimo,Col. 8, 5, 14.—The second and third syllable scanned short: senserat ire aquilas legio undevigesima, cujus, etc., Poët. ap. Anth. Lat. 2, p. 21.