Emily Dickinson Lexicon

prognostic (-'s, -s), n. [ME < OFr < L. prognōsticon < Gk προγιγνώσκειν, know beforehand.] (webplay: before, day, fair, future, know).

Prophet; seer; person who predicts the future; [fig.] prediction; prophecy; foreknowledge; foreshadowing; foretelling; supposition; conjecture; guess; hypothesis; surmise; reasoned speculation about future events.