Medical Definition of species
1a: a category of biological classification ranking immediately below the genus or subgenus, comprising related organisms or populations potentially capable of interbreeding, and being designated by a binomial that consists of the name of the genus followed by a Latin or latinized uncapitalized noun or adjective agreeing grammatically with the genus nameb: an individual or kind belonging to a biological species
2: a particular kind of atomic nucleus, atom, molecule, or ion <production of DNA damage by active oxygen species>
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Dictionary: Definition of "species" Thesaurus: All synonyms and antonyms for "species" Spanish Central: Translation of "species" Nglish: Translation of "species" for Spanish speakers Britannica English: Translation of "species" for Arabic speakers Britannica.com: Encyclopedia article about "species"
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