Webster’s Revised Unabridged Dictionary · 1913
Prognostic
Prog·nos′tic (·nŏs′tĭk), a. [Gr. προγνωστικός. See Prognosis.] Indicating something future by signs or symptoms; foreshowing; aiding in prognosis; as, the prognostic symptoms of a disease; prognostic signs.
Prog·nos′tic, n. [L. prognosticum, Gr. προγνωστικόν: cf. F. pronostic, prognostic. See Prognostic, a.]
1. That which prognosticates; a sign by which a future event may be known or foretold; an indication; a sign or omen; hence, a foretelling; a prediction.
That choice would inevitably be considered by the country as a prognostic of the highest import. Macaulay.
2. (Med.) A sign or symptom indicating the course and termination of a disease. Parr.
Syn. — Sign; omen; presage; token; indication.
Prog·nos′tic, v. t. To prognosticate. [Obs.]