^56 VOa^BULARY. 



u. 



Un'gulate. Shaped like a hoof. Having hoofs, as ungulate 

 quadrupeds. Webster. 



U'vEA (from uvea, a grape). The choroid coat of the eye ; the 

 post:^rior layer of the iris. 



U'VEOUS. Resembling a grape ; applied to the choroid coat of 

 the eye. 



V. 



Vas'cular. That which belongs or relates to vessels — arterial, 

 venous, lymphatic — but generally restricted to blood-vessels 

 only. Full of vessels. 



Velum Pala'ti. The soft palate. 



Ver'tebrje. The bones which form the spinal column. 



Vis'cus (plural, vis'cera). One of the organs contained in the 

 great cavities of the body ; any one of the contents of the 

 cranium, thorax, or abdomen ; in the plural, especially ap- 

 plied to the contents of the abdomen, as the stomach, intes- 

 tines, &c. Webster. 



Vit'reous. Of, pertaining to, or derived from glass. The vit- 

 reous humor of the eye is so called because it resembles 

 melted glass. 



Z. 



Zooi/OGY. That part of biology (science of life) which relates 

 to animal life, and, as generally understood, the science 

 which treats of the structure, classification, distribution, hab- 

 its, and derivation of living animals. In its broadest sense, 

 however, zoology includes the structure, relations, and his- 

 tories of extinct as well as living forms ; but this branch of 

 the science is generally considered by itself under the title 

 of ' paleontology.' The derivation and life-histories of many 

 groujjs of animals have been found written in the .records of 

 the past, and many mysteries, not only of relation but of 

 structure, have been solved by going back to find dwarfed 

 organs in full development and widely-separated forms linked 

 together. The zoology of the future will therefore include 

 the animal life of both the past and the present. 



J. S. Newberry. 



Zygomat'ic. That which relates to the zygoma or cheek bone. 



