A labial fricative is a fricative consonant, whose articulation involves the lips. Several kinds can be distinguished based on whether the articulation involves only the lips or either the teeth or the tongue:
- Bilabial fricatives (articulated with both lips):
- Labiodental fricatives (articulated with the lower lip touching against the upper teeth):
- Linguolabial fricatives (articulated with the tip or blade of the tongue against the upper lip:
- Voiceless linguolabial fricative [θ̼] or [ɸ̺]
- Voiced linguolabial fricative [ð̼] or [β̺]