The Collaborative International Dictionary of English v.0.48:
xvi \xvi\, adj. The Roman number symbolizing the value sixteen. Syn: sixteen, 16. [WordNet 1.5]WordNet (r) 3.0 (2006):
xvi adj 1: being one more than fifteen [syn: sixteen, 16, xvi] n 1: the cardinal number that is the sum of fifteen and one [syn: sixteen, 16, XVI]