diastema

from WordNet (r) 3.0 (2006)
diastema
    n 1: a gap or vacant space between two teeth
from The Collaborative International Dictionary of English v.0.48
Diastema \Di`a*ste"ma\, n. [L. See {Diastem}.] (Anat.)
   A vacant space, or gap, esp. between teeth in a jaw.
   [1913 Webster]
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