Speech sounds formed with a constriction between the tongue tip and the upper central incisors, or rather the part of the gum just above these teeth. Lingua-dental fricatives are voiceless as think and maths, and voiced as in this and father. The acquisition of first teeth facilitates the production of this sound.
See Bilabial, Clicks, Consonants, Fricative, Glottal, Labio-dental, Lateral sound, Lingua-alveolar (or alveolar), Liquid, Plosive, Rhotic sound