Linguolabials or
apicolabials are
consonants articulated by placing the tongue tip or blade against the upper lip, which is drawn downward to meet the tongue. They represent one extreme of a coronal articulatory continuum which extends from linguolabial to
subapical palatal places of articulation. Cross-linguistically, linguolabial consonants are very rare, though they do not represent a particularly exotic combination of articulatory configurations, unlike
click consonants or
ejectives. They are found in a cluster of languages in
Vanuatu, in the Kajoko dialect of
Bijago in Guinea-Bissau, as well as in
Umotína (a recently extinct
Bororoan language of
Brazil), and as
paralinguistic sounds elsewhere. They are also relatively common in
disordered speech, and the diacritic is specifically provided for in the
extensions to the IPA.