Descriptive of someone or something that can not produce offspring: "Atokous creatures may become nonproductive because of some form of sterility; such as, dogs, cats, bulls, etc."

"There are those who become atokous people by having their reproductive organs removed, either by choice or because they have genetically transmissible disabilities, etc."

"Other atokous examples include making some plants incapable of bearing fruit or germinating; or the rendering of land that makes it unfruitful because of chemicals, excessive salt, etc."