All Words Glossary

Glossary of Zoology 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.
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.
underbelly
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noun (underbellies)
  1. (figuratively) The side which is not normally seen
The area by the canal is the underbelly of town - not something you'd see in the guidebooks
undergrowth
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noun
  1. those plants in a forest which only reach a relatively low height (such as shrubs and bushes)
ungulate
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noun
  1. an ungulate animal; a hooved animal
    The majority of large land mammals are ungulates.
adjective
  1. having hoof, hooves
urochord
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noun
  1. (biology) a notochord that is limited to the caudal region; especially in the Urochordata
    1. any marine organism of the Urochordata

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