U-Word Vocabulary Definitions
| UBV Photometry. | Comparing observed stellar magnitudes with standard sequence. |
| udo. | Japanese plant - shoots are eaten. |
| ugli. | Jamaican cross between tangerine and grapefruit. |
| Uhlan. | Polish, and later, German lance cavalry. |
| ulema. | Scholars trained in traditional Moslem religion and law. Moslem mufti. |
| ulexite. | Rounded masses of very fine avicular crystals. |
| ulotrichous. | Wiry or woolly hair. |
| ulster. | Loose, long overcoat. |
| ultimo. | In or of last month. |
| Ultraism. | Extremism, radicalism. |
| ultramontane. | tramontane; Supporting Pope over national or diocesan authority. |
| ultramontane. | Beyond the limits of the world or of the universe. |
| umangite. | Dark-red copper selenide. |
| unbel. | Flat-topped or rounded flower cluster (like carrot). |
| umbellate. | One of the smaller secondary clusters. |
| umbilicus. | Navel; hollow at base of mollusk shell; opening in feather shaft. |
| umbo. | Boss or knob at center of shield; knob-like protuberance |
| umbrageous. | Affording shade; quick to take umbrage. |
| umiak. | Large, open Eskimo boat made of skins stretched over wooden frame. |
| una corda. | Soft pedal depressed. |
| unai. | unau |
| unaneled. | Not having received extreme unction. |
| unau. | Two-toed sloth |
| una voce. | With one voice, unanimously. |
| unbegotten. | Not yet begotten; increate, eternal. |
| uncial. | Somewhat rounded capital letters, 4th to 8th C.; the uncial style or hand. |
| unciform. | Hook-shaped. |
| uncinaria. | Hookworm.. |
| uncinus. | Hook-like structure like setae |
| unco. | Unusual surprise; amazing person; stranger |
| uncus. | Hook-shaped part or process. |
| undercroft. | A crypt. |
| underfur. | Dense, soft fur beneath coarse outer hairs. |
| underlet. | To rent for less than the proper value.. |
| underpin. | To corroborate. |
| undine. | Female water sprite. Could own soul by marrying a mortal and bearing his child. |
| undulent fever. | Persistent and recurrent fever. |
| ungual. | Resembling nail, hoof, or claw. |
| unguiculate. | Having nails or claws. |
| unguis. | Nail, hoof or claw. |
| unhousled . | arch.: Not having received the Eucharist. |
| Uniate Church. | Eastern church that acknowledges Papal supremacy, but retains own liturgy. |
| unicostate. | Having a single main costa or rib. |
| uniformitarianism. | Geological doctrine that past geological mechanisms were like present. |
| unpick | To undo by removing stitches. |
| unreeve | To withdraw a rope from an opening (e. g., a block). |
| Upanished. | Theology of ancient Hinduism, elaborating upon the Vedas. |
| upas. | Made poison arrows. |
| upset price. | The striking price at an auction. |
| uraeus. | Sacred serpent depicted on Egyptian rulers' headdresses. |
| Ural-Altaic. | Ugric, Samovedic, and ? languages. |
| urania. | Uranium dioxide. |
| Urania. | Muse of astronomy. |
| uranic. | Pertaining to the heavens, celestial; derived from uranium. |
| uraninite. | Uranium ore. |
| urceolat. | Urn-shaped. |
| Urdu. | Indic. Used in Pakistan and by Moslems in India. |
| uredinium. | A reddish, pustule-like structure formed on the tissue of a plant infected with rust fungus, and having hyphae that reproduce uredospores. |
| uredo. | Burning itch; to burn. |
| ureide. | Derivatives of urea. |
| uremia. | Excess urea in the blood. |
| ureotelic. | Eliminating unneeded nitrogen in the form of urea. |
| ureter. | Tube from kidney to bladder. |
| urethra. | Tube from bladder down. |
| uricosuric. | Promoting the excretion of uric acid. |
| uricotelic. | Eliminating excess nitrogen as uric acid. |
| Uriel. | One of the archangels. |
| Urim and Thummin. | Objects carried inside breastplates of the chief priests o ancient Israel and used as oracular media to determine the will of God. |
| urochrome. | Gives yellow urine. |
| urokinase. | Dissolves intravascular blood clots. |
| urolithiasis. | Formation of kidney stones. |
| uropod. | Posterior abdominal appendages of lobsters and shrimp. |
| uropygial gland. | Oil-secreting gland at base of bird's tail. |
| uropygium. | part of bird's body from which tail feathers grow. |
| urticant. | Causing itching or stinging. |
| urticaria. | Intensely itching welts. Caused by allergies, infections, or psychic factors. |
| urticate. | To sting or whip, as with nettles. |
| urtication. | A lashing with nettles of a paralyzed body region. |
| urus. | Extinct bovine mammal. |
| usufruct. | Right to utilize someone else's property as long as the property in not damaged or altered. |
| usurious. | Practicing usury. |
| Uther Pendragon. | Arthur's Dad. |
| utile. | Useful. |
| utricle. | A small, delicate, membranous sac connecting with the semicircular canals and functioning in bodily equilibrium and coordination. |
| uvea. | Pigmented vascular layer of the eye, including the iris, ciliary body, and chorion. |
| uvula. | Fleshy pendant in back of mouth. |
| uxorial. | Befitting a wife. |
| uxorious. | Milquetoast. |