T5017130 (tī-kä′dī′) n.A language family including the Tai subfamily and other languages of southern China and Southeast Asia. [Tai + Kadai (coined from ka-, prefix in Laqua (Tai-Kadai language of Vietnam and southern China) kădăŭ and Gelao (Tai-Kadai language of Vietnam and southern China) kǎtsü, man, human being + Dai).] Tai-Ka′dai′adj.