The Collaborative International Dictionary of English v.0.48:

Adamite \Ad"am*ite\, n. [From Adam.]
   1. A descendant of Adam; a human being.
      [1913 Webster]

   2. (Eccl. Hist.) One of a sect of visionaries, who,
      professing to imitate the state of Adam, discarded the use
      of dress in their assemblies.
      [1913 Webster]