The book is conceived as a special dictionary containing a lexical maximum of terms and concepts, covering the main sections of modern biology and biomedicine. Various sections of the dictionary present terms and concepts from anatomy, physiology, pathophysiology, general biology, zoology, botany, cell biology, general (classical) and molecular genetics, molecular biology, genomics, biochemistry, microbiology, virology, histology and embryology. Each term is given an etymological justification and an article is attached explaining the semantic content of the term or concept. Articles devoted to the most important and key biological terms contain the maximum reference material possible for this kind of literature with cross-references to other terms that are close in meaning. In addition, the dictionary focuses on the sections of biology that have been developing most rapidly in recent years (this applies primarily to molecular cell biology, genomics and related areas of knowledge).