Atlantidæ (Gr.) The ancestors of the Pharaohs and the forefathers of the Egyptians, according to some, and as the Esoteric Science teaches. (See S.D., Vol. II., and Esoteric Buddhism.) Plato heard of this highly civilized people, the last remnant of which was submerged 9,000 years before his day, from Solon, who had it from the High Priests of Egypt. Voltaire, the eternal scoffer, was right in stating that “the Atlantidæ (our fourth Root Race) made their appearance in Egypt It was in Syria and in Phrygia, as well as Egypt, that they established the worship of the Sun.” Occult philosophy teaches that the Egyptians were a remnant of the last Aryan Atlantidæ.
Source: H.P.Blavatsky - The Theosophical Glossary