龈音 (齦音) yínyīn

yínyīn noun an alveolar consonant
Domain: Linguistics 语言学 , Subdomain: Phonetics , Concept: Consonant 辅音
Notes: A consonant articulated with the tongue close to or against the superior alveolar ridge

Also contained in

齿龈音 、 颚龈音 、 软龈音