From ABO blood group to zygotic-effect genes, this reference provides 2000 concise definitions in the fields of biotechnology and genetic engineering. Designed to provide a basic vocabulary, it should allow those with an elementary knowledge to keep abreast of developments in the fields. Since the Dictionary addresses a broad audience from diverse backgrounds and covers a wide field, the authors have attempted to include both basic and technical terminology in a number of areas including plant and animal biology, to meet the needs of as many readers as possible.