| ui RNA | <molecular biology> A common type of small nuclear RNA (165 bases long) that serves to splice and/or remove exons of messenger RNA. (09 Oct 1997) |
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| uintatherium | <paleontology> An extinct genus of large Eocene ungulates allied to Dinoceras. This name is sometimes used for nearly all the known species of the group. See Dinoceras. Origin: NL, fr. Uinta, the Indian name of the region where the animals were discovered + Gr. Qhrion beast. Source: Websters Dictionary (01 Mar 1998) |
| UIP | <abbreviation> Usual interstitial pneumonia of Liebow. (05 Mar 2000) |