Biology refers to the science of life. It is the study of living organisms, divided into many specialized fields that cover their morphology, physiology, anatomy, behaviour, origin and distribution. It is one of the most rapidly developing areas of science. Biology is the key to understanding the health and growth of microorganisms, plants and animals. The learning of biology relates to careers in many fields, including medicine and other health professions, agriculture, law, laboratory and field research, education, resource management and industry. Biologists study the structure, function, growth, origin, evolution and distribution of living organisms.
This Dictionary provides an explanation of the main ideas and concepts central to biology. It presents a galore of terms and definitions related to the subject in an easy, precise and lucid manner. It is designed in a concise way to provide a subtle know-how to the learners of the subject or who are lean to know the biological terminologies. It has been compiled focusing on the usefulness of quick revision of the subject. It is essentially a book to pick up and put down—a book to browse through and use to add to your understanding of basic ideas.

Dr. Manish Ranjan is an I.A.S. Officer of 2002 batch and currently working with the Government of Jharkhand. He has served as Deputy Commissioner cum District Magistrate in various districts of Jharkhand successfully. He completed Ph.D. in Management Studies after an MBA from I.R.M.A., Gujarat.
Having an illustrious academic and professional career, he has received Director’s Gold Medal for securing first position in order of merit of IAS. Also remarkable are the Prime Minister’s Award for ‘Excellence in MGNREGA’ for two consecutive years, the ‘Nirmal Gram Puraskar’ by the President of India, ‘STAR RAFT’ award by AFID (Asian Federation of Intellectual Disabilities), Japan.
He has written some bestseller books including books on Communication Skills, Decision Making & Problem Solving and also on Civil Services Aptitude Test (CSAT). 
Dr. Ranjan has been an ardent admirer of Dr. Kalam and met him on several occasions. Being a quiz enthusiast and having won many quiz competitions at state and national level, he has presented the important aspects of Dr. Kalam’s life in quizzical form.