This dictionary is a sincere attempt to present an up-to-date entry of terms currently in used in molecular biology and biochemistry. It is intended to provide a convenient reference source for researchers, students and technicians. The dictionary tries to fill the vacuums that are found in other dictionaries on this subject. It tries to provide a consolidated, comprehensive and accessible list of terms and acronyms that are used in molecular biology and biochemistry. The students of higher studies including research scholars and professors will find this dictionary very useful and informative. The editor has taken immense pain and long innings of desk work while compiling and preparing this dictionary. Suggestions for any improvement will be welcomed and will be incorporated in the next edition. Considering the need of Molecular Biology students of higher studies, this dictionary has been carefully prepared in response to their needs.