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| Uranology | study of the heavens; astronomy (see list of branches of science) | ||
| Uranophobia | fear of heaven (see list of phobias) | ||
| Urbanology | study of cities (see list of branches of science) | ||
| Urenology | study of rust molds (see list of branches of science) | ||
| Urology | study of urine and the urinary tract (see list of branches of science) | ||
| Urophobia | fear of urine or urinating (see list of phobias) | ||
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