duodeviginti

• Symbol: XVIII

Literally "two from twenty"; from duo (“two”) + dē (“from”) vīgintī (“twenty”). Compare non-subtractive form octōdecim.

• (Classical) IPA^(key): /du.o.deː.u̯iːˈɡin.tiː/, [d̪uɔd̪eːu̯iːˈɡɪn̪t̪iː]
• (modern Italianate Ecclesiastical) IPA^(key): /du.o.de.viˈd͡ʒin.ti/, [d̪uod̪eviˈd͡ʒin̪t̪i]

duodēvīgintī (indeclinable)

1. eighteen; 18
   • c. 52 BCE, Julius Caesar, Commentarii de Bello Gallico 2.5:

     castra in altitudinem pedum XII vallo fossaque duodeviginti pedum muniri iubet.

     He orders him to fortify a camp with a rampart twelve feet in height, and a trench eighteen feet in breadth.

   • c. 69 CE – 122 CE, Suetonius, De vita Caesarum divi Augusti 65:

     G. et L. in duodeviginti mensium spatio amisit ambos, Gaio in Lycia, Lucio Massiliae defunctis.

     He lost Gaius and Lucius within the span of eighteen months, for the former died in Lycia and the latter at Massilia.

• octōdecim

• ūndēvīgintī
• vīgintī

• Appendix:Latin cardinal numbers

• “duodeviginti”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “duodeviginti”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• duodeviginti in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.