Dictionary.net

• A sect of the ancient Church which married, but lived in continence, after the manner, as they pretended, of Abel.

1914 - Nuttall's Standard dictionary of the English language
By Nuttall, P.Austin.

• An African sect, fourth century, who enjoined the separate state of the married, to avoid handing down original sin ; after an assumed example of Abel.

1895 - Glossary of terms and phrases
By Henry Percy Smith