/-{-{xiōngxiàn}-}-/, /hʊŋ⁵⁵ siːn³³/, /hung1 sin3/, /hung1 sin3/, /hung1 xin3/, /shiongshiann/, /syongsiàn/、/ㄒㄩㄥ ㄒㄧㄢˋ/
(解剖學) 動物的初級淋巴器官，部分骨髓免疫細胞（例如T細胞）在此成熟