INTERDENTAL By N., Pam M.S. - May 11, 2013 1. a term describing and denoting a speech sound made with the tongue placed between the upper and lower front teeth such as in th. 2. Name for a speech sound. INTERDENTAL: "Interdental is the name of a speech sound." Related Psychology Terms LABIODENTAL LABIAL FRICATIVE 1 GLOSSODYNIA LISP 1 DENTAL SUBVOCAL SPEECH MIDDLE CLASS ARTICULATOR GLOSSO- (GLOSS-) Cite this page: N., Pam M.S., "INTERDENTAL," in PsychologyDictionary.org, May 11, 2013, https://psychologydictionary.org/interdental/ (accessed December 10, 2019).