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uralite
uran-
uranalysis
Urania
uranic
uraninite
uranite
uranium
uranium 235
uranium 238
uranium-lead dating
uranography
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Uranus
uranyl
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urate
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uracil
u·ra·cil [ yrəssil ]


noun 
Definition:
 
RNA component: a pyrimidine base, one of the four bases in RNA in which it pairs with thymine.
Symbol  U
[Late 19th century. Origin ?]
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