Definition that contains classification system
- chamomile Eurasian plant with apple-scented foliage and white-rayed flowers and feathery leaves used medicinally; in some classification systems placed in genus Anthemis
- camomile Eurasian plant with apple-scented foliage and white-rayed flowers and feathery leaves used medicinally; in some classification systems placed in genus Anthemis
- alliaceae one of many families or subfamilies into which some classification systems subdivide the Liliaceae but not widely accepted; includes especially genus Allium
- family pteridaceae one of a number of families into which the family Polypodiaceae has been subdivided in some classification systems; Pteridaceae is itself in turn sometimes further subdivided
- hemerocallidaceae one of many subfamilies into which some classification systems subdivide the Liliaceae but not widely accepted; includes genus Hemerocallis
- alstroemeriaceae one of many families or subfamilies into which some classification systems subdivide the Liliaceae but not widely accepted; sometimes included in subfamily Amaryllidaceae
- subdivision basidiomycotina comprises fungi bearing the spores on a basidium; includes Gasteromycetes (puffballs) and Tiliomycetes comprising the orders Ustilaginales (smuts) and Uredinales (rusts) and Hymenomycetes (mushrooms, toadstools, agarics and bracket fungi); in some classification systems considered a division of kingdom Fungi
- dennstaedtiaceae one of a number of families into which Polypodiaceae has been subdivided in some classification systems
- abo blood group system a classification system for the antigens of human blood; used in blood transfusion therapy; four groups are A and B and AB and O
- russulaceae used in some classification systems for the genus Russula