أَذْلَقُ
1.
, and its plural ذُلْقٌ: see ذَلِقٌ.
2.
الحُرُوفُ الذُّلْقُ
The letters [that are pronounced by means] of the tip of the tongue and the lip: (S, K:) singular أَذْلَقُ: they are six; (S;) [comprised in the phrase مُرْ بِنَفْلٍ:] three of these are termed
ذَوْلَقِيَّةٌ, namely, ر and ل and ن; and three, شَفَوِيَّةٌ, namely, ب and ف and م: (S, K:) or all of these six letters are termed
ذَوْلَقِيَّةٌ. (TA voce عَسْجَدٌ.) Every quadriliteral-radical or quinqueliteral-radical word [that is genuine Arabic] contains one or two or three of these six letters: every word of either of these classes that does not contain one of these six letters is to be judged adventitious: all the other letters are termed الحُرُوفُ المُصْمَتَهُ. (IJ.)