龈后 (齦後) yínhòu

yínhòu noun a postalveolar consonant; a post-alveolar consonant
Domain: Linguistics 语言学 , Subdomain: Phonetics , Concept: Consonant 辅音
Notes: A consonant articulated with the tongue touching or near the back of the alveolar ridge

Also contained in

浊龈后擦音 、 清龈后擦音