Doubly articulated consonants are consonants with two simultaneous primary places of articulation of the same manner (both plosive, or both nasal, etc.). They are a subset of co-articulated consonants. They are to be distinguished from co-articulated consonants with secondary articulation, that is, a second articulation not of the same manner. An example of a doubly articulated consonant is the voiceless labial-velar plosive [k͡p], which is a [k] and a [p] pronounced simultaneously. On the other hand, the voiceless labialized velar plosive [kʷ] has only a single stop articulation, velar ([k]), with a simultaneous approximant-like rounding of the lips. In some dialects of Arabic, the voiceless velar fricative [x] has a simultaneous uvular trill, but this is not considered double articulation either.
There are four independently controllable articulations that may double up in the same manner of articulation: labial, coronal, dorsal, and pharyngeal. (The glottis controls phonation, and works simultaneously with many consonants. It is not normally considered an articulator, and an ejective [kʼ], with simultaneous closure of the velum and glottis, is not considered a doubly articulated consonant.)