The terminologies involved in the area of biotechnology are quite recent and the students and teachers of science, engineering and also research scholars need to know the terms of biotechnology and their meanings to adopt them in their learning and teaching process as well as research work. As there is no compilation of terms related to biotechnology so far, it was felt imperative to have one. It will serve as a ready reference for the graduate and post-graduate level students of biotechnological science and engineering as also the research students and teachers. The present dictionary covers the areas of:  Molecular Biology  Microbiology Genetic Engineering  Biochemistry Environmental Biotechnology Plant and Animal Biotechnology