Summary: Penguin Reference Books features "A Dictionary of Science" by E. B. Uvarov, D. R. Chapman, and Alan Isaacs, offering a comprehensive overview of various scientific fields. Uvarov, with a background in chemistry and biochemistry, collaborated with Chapman and Isaacs, who have expertise in physics and rocket propulsion. The book covers topics ranging from electromagnetism to crystal structures and from botany to biochemistry. With definitions, explanations, and examples, it serves as a valuable resource for students and professionals alike. The fourth edition was published in 1971, incorporating new material and insights into the fast-evolving world of science. It captures key concepts such as the laws of motion, chemical reactions, and the behavior of matter. With a detailed account of terms like "nacent state," "stationary orbit," and "stibine," the text provides a foundation for understanding complex scientific phenomena. This dictionary aims to demystify science and make it accessible to a wide audience by presenting information in a clear and concise manner.