The book is designed to provide you with dictionaries of terms in science, Physics, Chemistry and Biology to make science simpler for you. The terms have been arranged alphabetically for quick reference. Suitable explanations of terms that have come into public domain recently also find mention. The standard of explanation has been kept at a level of understanding expected from an average secondary and senior secondary student. Illustrations and examples, at appropriate places, have been given. Readers who have not made a special study of any science subject will have also be able to grasp the definitions. A glossary of Nobel Prize winners and their contributions is an added attraction.