horoscopist|hɒˈrɒskəpɪst| [f. L. hōroscop-us + -ist.] = horoscoper. 1652Gaule Magastrom. 3 He would not give the least occasion to planetary horoscopists and monethly prognosticators.1883Contemp.Rev. June 849 The astronomical writings and tables of the ancient horoscopists are lost.