Zoology, or the study of animal species, is a science thathas created a large, specialist vocabulary. Taxonomy, or science of namingspecies involves thousands of names. Cytology, or the study of cells, involveshundreds of words for the organelles of the cell. The physiology and anatomy ofhuman beings and animals need the creation of many more words.The chemical and bio-chemical reactions involved in digestion, respiration,growth, hormone formation etc. need hundreds of complex terms. It is apparentthat Zoology cannot be studied without a good dictionary to guide the studentswhen the going gets tough. Here is a dictionary that fulfills this need. It not only covers terms used in Taxonomy, Cytology and Biochemistry, but it alsocovers the new grounds of ecology of environmentalism. Definitions are detailedand the reader can read the dictionary as a text to increase his generalknowledge of Zoology.