glot·tal /ˈglɑtḷ/
  (a.)聲門的,用聲門發聲的
  glot·tal /-ɪk/ 形容詞
  聲門的
  Glot·tal a. Of or pertaining to, or produced by, the glottis; glottic.
  Glottal catch, an effect produced upon the breath or voice by a sudden opening or closing of the glotts. --Sweet.
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  glottal
       adj : of or relating to or produced by the glottis; "glottal
             stops"