systematics

The science of systematic classification.

A system of classification, as biosystematics.

The systematic classification of organisms, especially in terms of the similarities or evolutionary relationships among them; taxonomy.

The principles and practice of classification; the study of system, or the formation of any system; systematology; taxonomy. See system, 11.

The science of systematic classification, especially of organisms. Depending on context this may be the same as taxonomy or distinct. In the latter case systematics will be taken to mean the research into the relationships of organisms, while taxonomy will involve itself in the recognition and the naming of taxa.

the science of systematic classification