ultracentrifugeEnglishOxford Dictionary of Englishultracentrifuge /ˌʌltrəˈsɛntrɪfjuː(d)ʒ / ▸ noun a very fast centrifuge used to precipitate large biological molecules from solution or separate them by their different rates of sedimentation. ▸ verb [with object] subject to the action of an ultracentrifuge: the samples were ultracentrifuged for two hours. – DERIVATIVES ultracentrifugal adjective ultracentrifugation noun