dentilingual

from The Century Dictionary.

• Formed between the teeth and the tongue: said especially of the two th sounds of thin and this, less properly of the sounds generally called dental (which see). Also called linguadental.
• noun A consonant formed between the teeth and the tongue.
• noun Less properly dentolingual.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Produced by applying the tongue to the teeth or to the gums; or representing a sound so formed.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective anatomy Of or pertaining to the teeth and the tongue
• adjective linguistics, of a sound Produced with the tongue touching the teeth