Abstract
In this chapter terminology and definitions are provided to give precise meaning to the terms that are used in this monograph. The use and meaning of terms employed in teratology studies vary between laboratories (Black and Marks, 1986) and regulatory agencies of different countries. An attempt to achieve worldwide uniformity in the assessment of human risks, particularly those involving prenatal and postnatal development, is an absolute need in view of rising international trade in foods, drugs, chemicals, and other regulated consumer products. Generally accepted terminology and definitions of key terms are necessary prerequisites for achieving such uniformity.
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