The name used by
Kaoru Nagisa to indicate
humans. According to legend, Lilim (also called "Lil-In") were the
children born to
Adam and his first wife
Lilith. After that, Lilith became a
demon who attacked new-born
babies and seduced
men in their sleep to cause
nocturnal emissions.
Source: The End of Evangelion : Glossary contained within The End of Evangelion - Theatrical Program.
Kaoru Nagisa an Angel claimed in Evangelion Episode 24 that music was "the highest culture that Lilims generated". If you listen to any of the Evangelion Music it is not hard to figure out why.