octodecim

== Latin == === Alternative forms === Symbol: XVIII === Etymology === From octō (“eight”) + decem (“ten”). === Pronunciation === (Classical Latin) IPA(key): [ɔkˈtoː.dɛ.kĩː] (modern Italianate Ecclesiastical) IPA(key): [okˈtɔː.de.t͡ʃim] === Numeral === octōdecim (indeclinable) (rare) eighteen; 18 1543, Petrus Comestor, Historia Scholastica, III Kings, "De porticu" ==== Usage notes ==== This form is rare, and is found primarily in bookish post-Classical Latin. The usual word for eighteen in Classical Latin is duodēvīgintī, whereas modern Romance languages descend from the form decim et octō. ==== Synonyms ==== duodēvīgintī ==== See also ==== Appendix:Latin cardinal numbers === References === “octodecim”, in Charlton T. Lewis and Charles Short (1879), A Latin Dictionary, Oxford: Clarendon Press “octodecim”, in Charlton T. Lewis (1891), An Elementary Latin Dictionary, New York: Harper & Brothers “octodecim”, in Gaffiot, Félix (1934), Dictionnaire illustré latin-français, Hachette.