xxiii

from WordNet (r) 3.0 (2006)
xxiii
    adj 1: being three more than twenty [syn: {twenty-three}, {23},
           {xxiii}]
    n 1: the cardinal number that is the sum of twenty-two and one
         [syn: {twenty-three}, {23}, {XXIII}]
    
from The Collaborative International Dictionary of English v.0.48
xxiii \xxiii\, adj.
   The Roman number representing {twenty-three}.

   Syn: twenty-three, 23.
        [WordNet 1.5]
    

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