(n.) That division of the natural sciences which treats of the classification of animals and plants; the laws or principles of classification.

aerobiology agrobiology analysis anatomy animal physiology anthropology antonomasia arrangement assortment astrobiology bacteriology binomial nomenclature biochemics biochemistry biochemy bioecology biological science biology biometrics biometry bionics bionomics biophysics biosystematics biosystematy botany cataloging categorization cell physiology class classification codification comparative anatomy conchology cryobiology culling cybernetics cytology division ecology electrobiology embryology entomology enzymology ethnobiology ethology exobiology family filing genetics genus glossology gnotobiotics gradation grading grouping helminthology herpetology ichthyology indexing kingdom life science malacology mammalogy microbiology molecular biology nomenclature onomastics onomatology order orismology ornithology pharmacology phylum physiology pigeonholing place-names place-naming placement polyonymy protozoology radiobiology ranging ranking rating screening selection sifting sorting sorting out species stratification subdivision subordination systematics tabulation taxidermy terminology toponymy triage trinomialism typology virology xenobiology zoogeography zoography zoology zoonomy zoopathology zoophysics zootaxy zootomy