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Glossary of Anatomy Terms
beginning with letter U
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ulna
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noun (ulnae, pl2=ulnas)
  1. (anatomy) The postaxial bone of the forearm, or branchium, corresponding to the fibula of the hind limb.
umbilical
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noun
  1. (aerospace) an umbilical cord connecting an astronaut to a spacecraft etc
adjective
  1. of, or relating to the navel (= umbilicus) or the umbilical cord
umbilical cord
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noun
  1. (anatomy) The flexible structure connecting a foetus with the placenta; which transports nourishment to the foetus and removes waste.
  2. (aerospace) The line that supplies an astronaut with oxygen and communications when outside a spacecraft
  3. (aerospace) any of the various lines connecting a rocket to its launch pad before liftoff
umbilicus
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noun (umbilici, pl2=umbilicuses)
  1. (anatomy) navel
umbo
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noun (plural umbones or umbos)
  1. (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.
    1. 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.
    2. (zoology) One of the lateral prominence just above the hinge of a bivalve shell.
upgrowth
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noun
  1. The process or result of growing up; progress; development.
Quotations
  • The new and mighty of poetry in Italy. - J. R. Green
upper arm
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noun
  1. the section of an arm from the elbow to the shoulder.
urethra
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noun (pl=urethras or, in technical usage, urethrae)
  1. (anatomy) The tube through which urine exits the body and, in males, through which semen is ejaculated.
uterine
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adjective
  1. of or pertaining to the uterus
uvea
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noun
  1. (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.
uvula
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noun (pl=uvulas, pl2=uvulae)
  1. (anatomy) The fleshy appendage that hangs from the back of the palate, that closes the nasopharynx during swallowing.
uvular
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adjective
  1. (anatomy) Of or relating to the uvula.
  2. (phonetics) Of a sound, articulated with the uvula.
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