Dentolabial consonants are consonants articulated with the lower teeth against the upper lip, the reverse of labiodental consonants. They are rare cross-linguistically, likely due to the prevalence of dental malocclusions (especially retrognathism) that make them difficult to produce, but one allophone of Swedish // has been described as a velarized dentolabial fricative.
The diacritic for dentolabial consonants in the Extended IPA is a superscript bridge, ⟨ ͆ ⟩, by analogy with the subscript bridge used for labiodentals. For example, the voiced dentolabial fricative is transcribed ⟨v͆⟩, and the dentolabial nasal ⟨m͆⟩.
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