1) Biological science 2) Biology 3) Of beastly studies 4) Of or pertaining to zoology 
• (a.) Of or pertaining to zoology, or the science of animals.
Zo`ö·log'ic·al adjective [ Confer French zoologique .] Of or pertaining to zoölogy, or the science of animals. 
[adj] - concerning the study of animals and their classification and properties 2. [adj] - of or relating to animals or animal groups
zoological 1. Of animals and animal life; a zoological region, a zoological exhibition. 2. Having to do with zoology; zoological works, a zoological experiment.
adjective of or relating to animals or animal groups; `zoological garden`
of or pertaining to zoology. · relating to or concerned with animals.