noun, plural: orders
(1) (taxonomy) A taxonomic rank used in classifying organisms, generally below the class, and comprised of families sharing a set of similar nature or character
(2) A succession or sequence, usually arranged in a series
(Taxonomy) For instance, Class Mammalia includes Order Chiroptera (bats), Order Primates (primates), Order Carnivora (meat-eating mammals), Order Cetacea (whales and purpoises), Order Insectivora (insect-eaters), etc.
Order in a hierarchical classification of organisms is generally in between Class and Family. However, in certain forms of classification, other taxonomic ranks in between include the following:
Word origin: Latin ōrdinem, ōrdō (row, rank, regular arrangement”)