OSDabbr.(美国)海洋科学部（=Ocean Science Division)abbr.屏幕显示(=show on-screen)OSabbr.操作系统=（Operating System）oscillating tube振荡管osmoticpotential渗透势os endochondrale软骨内化骨osmotic injector渗透压注射器Oswaldia issikiin.短爪奥斯渥寄蝇oscillating mine悬动水雷os epitympanicum鼓上骨, 鼓外骨os nasoturbinale鼻甲骨Osculating value密切值os ectethmoidale外筛骨