From BiblePortal Wikipedia

Watson's Biblical & Theological Dictionary [1]

or KARAEITES, an ancient Jewish sect. The name signifies Textualists, or Scripturists, and was originally given to the school of Shammai, (about thirty years or more before Christ,) because they rejected the traditions of the elders, as embraced by the school of Hillel and the Pharisees, and all the fanciful interpretations of the Cabbala. They claim, however, a much higher antiquity, and produce a catalogue of doctors up to the time of Ezra. The rabbinists have been accustomed to call them Sadducees; but they believed in the inspiration of the Scriptures, the resurrection of the dead, and the final judgment. They believe that Messiah is not yet come, and reject all calculations of the time of his appearance:

yet they say, it is proper that even every day they should receive their salvation by Messiah, the Son of David. As to the practice of religion, they differ from the rabbinists in the observance of the festivals, and keep the Sabbath with more strictness. They extend their prohibition of marriage to more degrees of affinity, and admit not of divorce on any slight or trivial grounds. The sect of Caraites still exists, but their number is inconsiderable. They are found chiefly in the Crimea, Lithuania, and Persia; at Damascus, Constantinople, and Cairo. Their honesty in the Crimea is said to be proverbial.

Charles Buck Theological Dictionary [2]

A Jewish sect, which adheres closely to the text and letter of the Scriptures, rejecting the rabbinical interpretations and the cabbala. The Talmud appearing in the beginning of the sixth century, those of the best sense among the Jews were disgusted at the ridiculous fables with which it abounded. But about the year 750, Anan, a Babylonish Jew, declared openly for the written word of God alone, exclusive of all tradition; and this declaration produced a schism. Those who maintained the Talmud being almost all rabbins, were called rabbinists; and the others, who rejected traditions, were called Caraites, or Scripturists, from the word cara, which in the Babylonish language signifies Scripture.