唇联合
Commissura labiorum oris
定义
口角是口的角部，上唇（superior labium）唇红缘与下唇（inferior labium）唇红缘在此相交汇。
參考資料
This definition incorporates text from the wikipedia website - Wikipedia: The free encyclopedia. (2004, July 22). FL: Wikimedia Foundation, Inc. Retrieved August 10, 2004, from http://www.wikipedia.org
