喉音 [－－]

Jyutping hau4 jam1
Pinyin hóu yīn

Definitions (CC-CEDICT)
  1. guttural sound
  2. (linguistics) glottal (or laryngeal) consonant
Definitions (Wiktionary)
  1. noun
    glottal/laryngeal consonant
  2. noun, Chinese
    a guttural onset consonant, any of the group of consonants represented by the Middle Chinese pronunciation the following 字母 (zìmǔ): 影 (/ʔ/), 曉／晓 (/h/ or /x/), 匣 (/ɦ/) and 喻 (/j/)