A place of articulation characterised by the tip of the tongue being held against the back of the upper teeth, for instance in the pronunciation of /t, d/ in Italian, Swedish, etc. Indicated by a subscript diacritic representing a tooth, i.e. d. The initial sounds in English this and think are sometime referred to as dental fricatives but the description ambi-dental is more appropriate as the tip of the tongue need only be in the region of the teeth.