| a combining form representing sinus in compound words: sinorespiratory. |
| a combining form meaning “Chinese”: Sino-Tibetan; Sinology. |
| Sino- pref. Chinese: Sinology. [From Late Latin Sīnae, the Chinese, from Greek Sīnai, from Arabic Sīn, China, probably from Chinese Qín, Qin; see Qin.] |