| ulna |
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noun (ulnae, pl2=ulnas)
- (anatomy) The postaxial bone of the forearm, or branchium, corresponding to the fibula of the hind limb.
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| umbilical |
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noun
- (aerospace) an umbilical cord connecting an astronaut to a spacecraft etc
adjective
- of, or relating to the navel (= umbilicus) or the umbilical cord
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| umbilical cord |
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noun
- (anatomy) The flexible structure connecting a foetus with the placenta; which transports nourishment to the foetus and removes waste.
- (aerospace) The line that supplies an astronaut with oxygen and communications when outside a spacecraft
- (aerospace) any of the various lines connecting a rocket to its launch pad before liftoff
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| umbilicus |
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noun (umbilici, pl2=umbilicuses)
- (anatomy) navel
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| umbo |
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noun (plural umbones or umbos)
- (Armor) The boss of a shield, at or near the middle, and usually projecting, sometimes in a sharp spike.
- Quotations
- 1786: It is thirteen inches diameter, made of wood covered with leather, and an iron plate decorated with nails and mouldings; the boss or umbo projects four inches. — Francis Grose, A Treatise on Ancient Armour and Weapons, page xii.
- A boss, or rounded elevation, or a corresponding depression, in a palate, disk, or membrane; as, the umbo in the integument of the larví¦ of echinoderms or in the tympanic membrane of the ear.
- (zoology) One of the lateral prominence just above the hinge of a bivalve shell.
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| upgrowth |
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noun
- The process or result of growing up; progress; development.
- Quotations
- The new and mighty of poetry in Italy. - J. R. Green
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| upper arm |
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noun
- the section of an arm from the elbow to the shoulder.
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| urethra |
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noun (pl=urethras or, in technical usage, urethrae)
- (anatomy) The tube through which urine exits the body and, in males, through which semen is ejaculated.
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| uterine |
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adjective
- of or pertaining to the uterus
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| uvea |
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noun
- (anatomy) The middle of the three concentric layers that make up the eye; it is pigmented and vascular, and comprises of the choroid, the ciliary body, and the iris.
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| uvula |
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noun (pl=uvulas, pl2=uvulae)
- (anatomy) The fleshy appendage that hangs from the back of the palate, that closes the nasopharynx during swallowing.
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| uvular |
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adjective - (anatomy) Of or relating to the uvula.
- (phonetics) Of a sound, articulated with the uvula.
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