1  definition  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Interdental  \In`ter*den"tal\,  a. 
  1.  Situated  between  teeth;  as  an  interdental  space,  the 
  space  between  two  teeth  in  a  gear  wheel. 
 
  2.  (Phon.)  Formed  between  the  upper  and  lower  teeth;  as 
  interdental  consonants. 

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