n-th

from WordNet (r) 3.0 (2006)
n-th
    adj 1: last or greatest in an indefinitely large series; "to the
           nth degree" [syn: {nth}, {n-th}]
from The Collaborative International Dictionary of English v.0.48
nth \nth\ adj.
   Last or greatest in an indefinitely large series; as, to the
   nth degree.
   [WordNet 1.5]
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