Dæmon (Gr.) In the original Hermetic works and ancient classics it has a meaning identical with that of “god”, “angel” or “genius”. The Dæmon of Socrates is the incorruptible part of the man, or rather the real inner man which we call Nous or the rational divine Ego. At all events the Dæmon (or Daimon of the great Sage was surely not the demon of the Christian Hell or of Christian orthodox theology. The name was given by ancient peoples, and especially the philosophers of the Alexandrian school, to all kinds of spirits, whether good or bad, human or otherwise. The appellation is often synonymous with that of gods or angels. But some philosophers tried, with good reason, to make a just distinction between the many classes.
Source: H.P.Blavatsky - The Theosophical Glossary