In
phonetics, a sound made with both the
lips, and contact of the back of the tongue with the
velum (soft palate). A common labiovelar sound is W, in languages that pronounce it the English way.
Apart from that the only other true ones are KP and GB, commonly found in West African languages, but elsewhere nowhere in the world except Solomon Islands.
The labialized velar sounds Kw and Gw may also be called labiovelar, though strictly the velar is primary and the labial component secondary. They are very common worldwide, and existed as a series in Proto-Indo-European. They function as a single sound, unlike the English sequence QU (= KW).