Source : Free On-Line Dictionary of Computing

domainist
     
         /doh-mayn'ist/ 1. Said of a domain address (as
        opposed to a {bang path}) because the part to the right of the
        "@" specifies a nested series of "domains"; for example,
        [email protected] specifies the machine called snark in
        the subdomain called thyrsus within the top-level domain
        called com.  See also {big-endian}.
     
        2. Said of a site, mailer or routing program which knows how
        to handle domainist addresses.
     
        3. Said of a person (especially a site admin) who prefers
        domain addressing, supports a domainist mailer, or
        proselytises for domainist addressing and disdains {bang
        paths}.  This term is now (1993) semi-obsolete, as most sites
        have converted.
     
        [{Jargon File}]
     
        (1995-04-21)