Of a sound: articulated with the lips and the tongue.
Of or relating to the labial and lingual sides of a (front) tooth; designating an axis or plane passing through these sides of a tooth; existing or occurring in this plane.
A speech sound articulated with the lips and the tongue; a labiolingual sound.
Mid 19th century; earliest use found in Alexander Melville Bell (1819–1905). From labio- + -lingual.