| Places of articulation |
|---|
|
• Labial |
| Bilabial |
| Labial-velar |
| Labial-alveolar |
| Labiodental |
|
• Bidental |
|
• Coronal |
| Linguolabial |
| Interdental |
| Dental |
| Denti-alveolar |
| Alveolar |
| Apical |
| Laminal |
| Postalveolar |
| Alveolo-palatal |
| Retroflex |
|
• Dorsal |
| Palatal |
| Labial-palatal |
| Velar |
| Uvular |
| Uvular-epiglottal |
|
• Radical |
| Pharyngeal |
| Epiglotto-pharyngeal |
| Epiglottal |
|
• Glottal |
|
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Radical consonants are those consonants articulated with the root (base) of the tongue in the throat. They include the pharyngeal and epiglottal places of articulation.
The term radical was coined to help 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, the term pharyngeal is still commonly used in the broader sense, and authors such as Miller (2005) prefer guttural, which may include glottal consonants as well.