taxonomist

Concise Oxford English Dictionary © 2008 Oxford University Press:
taxonomy /takˈsɒnəmi/

▶noun chiefly Biology the branch of science concerned with classification.

■ a scheme of classification.

– derivatives
taxonomic adjective,
taxonomical adjective,
taxonomically adverb,
taxonomist noun.

– origin C19: coined in Fr. from Gk taxis ‘arrangement’ + -nomia ‘distribution’.