Main Entry: spe·cies

Pronunciation: \ˈspē-(ˌ)shēz, -(ˌ)sēz\

Function: noun

Inflected Form(s): plural species

1 a : 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 name b : 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>