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Uniflorous
- Bearing one flower only; as, a uniflorous peduncle.
Unifollilate
- Having only one leaflet, as the leaves of the orange tree.
Uniformism
- The doctrine of uniformity in the geological history of the earth; -- in part equivalent to uniformitarianism, but also used, more broadly, as opposed to catastrophism.
Uniformitarian
- Of, pertaining to, or designating, the view or doctrine that existing causes, acting in the same manner and with essentially the same intensity as at the present time, are sufficient to account for all geological changes.
Uniformitarianism
- The uniformitarian doctrine.
Unifromness
- The quality or state of being uniform; uniformity.
Unigeniture
- The state of being the only begotten.
Unigenous
- Being of one kind; being of the same genus.