Lists of words and/or phrases that are used to index and/or retrieve content, and that may include cross-references. For lists of words and their synonyms and often their antonyms see Thesauri (Dictionaries).
--subdivision Classification under individual animals and groups of animals and individual plants and groups of plants, e.g. Fishes--Classification; Corn--Classification
--subdivision Classification under individual animals and groups of animals and individual plants and groups of plants, e.g. Fishes--Classification; Corn--Classification