noun, plural -cies, adjective | 1. | a class of individuals having some common characteristics or qualities; distinct sort or kind. |
| 2. | Biology. the major subdivision of a genus or subgenus, regarded as the basic category of biological classification, composed of related individuals that resemble one another, are able to breed among themselves, but are not able to breed with members of another species. |
| 3. | Logic.
|
| 4. | Ecclesiastical.
|
| 5. | Obsolete. specie; coin. |
| 6. | the species, the human race; mankind: a study of the species. |
| 7. | Horticulture. pertaining to a plant that is a representative member of a species, one that is not a hybrid or variety: a species rose; a species gladiolus. |

spe·cies (spē'shēz, -sēz) n. pl. species
[Middle English, logical classification, from Latin speciēs, a seeing, kind, form; see spek- in Indo-European roots.] |
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.”
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.
An organism belonging to such a category, represented in binomial nomenclature by an uncapitalized Latin adjective or noun following a capitalized genus name, as in the bacterium Escherichia coli.
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. |