|a microscopic structure containing nuclear and cytoplasmic material enclosed by a semipermeable membrane, the basic structural unit of all organisms|
|a widely distributed group of photosynthetic prokaryotic organisms, resembling phototrophic bacteria, occurring in diverse habitats|
|species (ˈspiːʃiːz, Latin ˈspiːʃɪˌiːz)|
|—n , pl -cies|
|a. sp any of the taxonomic groups into which a genus is divided, the members of which are capable of interbreeding: often containing subspecies, varieties, or races. A species is designated in italics by the genus name followed by the specific name, for example Felis domesticus (the domestic cat)|
|b. the animals of such a group|
|c. any group of related animals or plants not necessarily of this taxonomic rank|
|2.||(modifier) denoting a plant that is a natural member of a species rather than a hybrid or cultivar: a species clematis|
|3.||logic a group of objects or individuals, all sharing at least one common attribute, that forms a subdivision of a genus|
|4.||a kind, sort, or variety: a species of treachery|
|5.||chiefly RC Church the outward form of the bread and wine in the Eucharist|
|6.||obsolete an outward appearance or form|
|[C16: from Latin: appearance, from specere to look]|
species spe·cies (spē'shēz, -sēz)
n. pl. species
A fundamental category of taxonomic classification, ranking below a genus or subgenus and consisting of related organisms capable of interbreeding.
A class of pharmaceutical preparations consisting of a mixture of dried plants in sufficiently fine division to be used in making boiled extracts or infusions.
A specific type of atomic nucleus, atom, ion, or molecule.
|species (spē'shēz, spē'sēz) Pronunciation Key
A group of organisms having many characteristics in common and ranking below a genus. Organisms that reproduce sexually and belong to the same species interbreed and produce fertile offspring. Species names are usually written lower case and in italics, as rex in Tyrannosaurus rex. See Table at taxonomy.
A group of closely related and interbreeding living things; the smallest standard unit of biological classification. Species can be divided into varieties, races, breeds, or subspecies. Red pines, sugar maples, cats, dogs, chimpanzees, and people are species; Siamese cats and beagles are varieties, not species. (See Linnean classification.)
Note: The term can be used to refer to any group of related things: “This species of novel has become quite popular in recent years.”
see endangered species.