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. Macaulay.
2. (Med.) A sign or symptom indicating the course and termination of a disease. Parr.
Syn. — Sign; omen; presage; token; indication.