This Illustrated Dictionary of Entomology is designed to benefit primarily amateur biologists with an interest in insects and anyone who desires to comprehend the science of entomology. The dictionary includes technical terms related to various disciplines of entomology, such as morphology, anatomy, physiology, systematics, ecology, pest management, and general entomology. Additionally, where possible, the technical meanings of these terms have been clarified with the help of labeled diagrams. In order to make the entomological terms more understandable for students of entomology and those who are not experts in the field, the dictionary defines these terms in a simple manner. The dictionary will also serve as a useful resource for those preparing for competitive examinations in entomology and plant protection, as well as for teachers, students, scientists, technologists, and extension specialists who deal with insects in some capacity.