dŭŏ-dē-vīginti,
card. num. , eighteen , Plaut. Poen. 4, 2, 74 sq.; Cic. Ac. 2 ( Luc. ), 41, 128; id. Rep. 2, 22; Caes. B. G. 2, 5 fin. ; id. B. C. 3, 71 al.; cf. also: annis mille centum et duobus de viginti fere, etc., Eutr. 10, 9.
duo-dē-vīgintī num, eighteen: pedes, Cs., C. ...
An Elementary Latin Dictionary