The Glottal consonant reference article from the English Wikipedia on 24-Apr-2004
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Glottal consonant

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Glottal consonants are consonants articulated with the glottis.

The glottal consonants identified by the International Phonetic Alphabet are:

IPA Symbol Name Example Meaning
ʔ Glottal stop
ɦ Voiced glottal fricative
h Voiceless glottal fricative

See also