Prog*nos"tic (?), a. [Gr. &?;. 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. &?;: 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.

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.]

• a sign by which a future event may be known or foretold; an indication; a sign or omen; hence, a foretelling; a prediction.
       Careful observers may foretell the hour
       (By sure prognostics) when to dread a show'r.
       While rain depends, the pensive cat gives o'er
       Her frolics, and pursues her tail no more. Jonathan Swift
  
• A sign or symptom indicating the course and termination of a disease.
  
• of or relating to prognosis, prediction