xvii

from WordNet (r) 3.0 (2006)

xvii
    adj 1: being one more than sixteen [syn: {seventeen}, {17},
           {xvii}]
    n 1: the cardinal number that is the sum of sixteen and one
         [syn: {seventeen}, {17}, {XVII}]

from The Collaborative International Dictionary of English v.0.48

xvii \xvii\, adj.
   The Roman number symbolizing the value seventeen.

   Syn: seventeen, 17.
        [WordNet 1.5]

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