Taxonomy

n.	1.	That division of the natural sciences which treats of the classification of animals and plants, primarily by consideration of their natural relationships with respect to their structure or genetic origin; the laws or principles of classification; systematics.
	2.	A systematic arrangement of objects or concepts showing the relations between them, especially one including a hierarchical arrangement of types in which categories of objects are classified as subtypes of more abstract categories, starting from one or a small number of top categories, and descending to more specific types through an arbitrary number of levels. An ontology usually contains a taxonomy as one of the important principles of organization.

Noun	1.	taxonomy - a classification of organisms into groups based on similarities of structure or origin etc
	2.	taxonomy - (biology) study of the general principles of scientific classification
	3.	taxonomy - practice of classifying plants and animals according to their presumed natural relationships

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