(biology) taxonomic group whose members can interbreed
"The newly discovered frog shares so many genetic similarities with the common leopard frog that scientists suspect they belong to the same species."
Type or kind. (Compare race.)
"The bank manager refused to accept any more gold coins, insisting that customers deposit them as legal tender species instead."
A group of plants or animals having similar appearance.
plural of specie
In plain English: A species is a group of living things that are so similar they can breed and make babies together.
"The biologist identified the endangered species in the remote forest."
Usage: Use species to refer to any distinct type, variety, or classification within a broader category, such as different species of birds. When discussing biology specifically, it denotes a group of organisms that share common characteristics and can interbreed.
The word species comes from the Latin speciēs, meaning "appearance" or "quality," which was derived from the verb speciō ("to see"). It entered English as a doublet of spice, sharing a common root related to seeing or perceiving qualities.