资料来源 : pyDict

牙齿之间的,舌头放在上下牙齿间发音的

资料来源 : Webster's Revised Unabridged Dictionary (1913)

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.