RADICAL CONSONANT

'Radical consonants' are articulated with the root (base) of the tongue in the throat. They include the pharyngeal and epiglottal places of articulation. Glottal consonants are also sometimes considered radicals, but they are more accurately described as having no place of articulation other than their phonation.
The term ''radical'' was coined to disambiguate ''pharyngeal'', which had come to mean any consonant articulated in the throat, whether the articulator was the back of the tongue ("high" pharyngeals) or the epiglottis ("low" pharyngeals). However, ''radical'' has not completely taken over, and ''pharyngeal'' is still commonly used in this broader sense.