Compared to Henderson's Dictionary of Biology (more comprehensive, research-level) or Oxford Dictionary of Biology , Rupp’s is intentionally shorter and more focused on exam-relevant definitions for students rather than exhaustive coverage of all botanical/zoological taxa. If you need a specific term defined from Rupp’s dictionary, please provide the word, and I will give you a definition in the style and level of detail consistent with Rupp’s work. If you are trying to locate a PDF or purchase a copy, please note that I cannot distribute copyrighted material, but I can guide you to legitimate sources (library catalogs, used book sites).
Rupp's Biology Dictionary (often referenced as Rupp's Biological Dictionary ) dictionary biology rupp
Dr. Richard L. Rupp (a prominent biological sciences educator) research-level) or Oxford Dictionary of Biology