Prognostic

a.	1.	Indicating something future by signs or symptoms; foreshowing; aiding in prognosis; as, the prognostic symptoms of a disease; prognostic signs.
n.	1.
	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.
v. t.	1.	To prognosticate.

Noun	1.	prognostic - a sign of something about to happen; "he looked for an omen before going into battle" Synonyms: omen, portent, prognostication, presage, prodigy
Adj.	1.	prognostic - of or relating to prediction; having value for making predictions Synonyms: predictive, prognosticative

apocalyptic, augural, auguring, augury, boding, divinatory, fatidic, forecasting, forerunning, foreseeing, foreshadowing, foreshowing, foretelling, foretokening, forewarning, fortunetelling, haruspical, heavy with meaning, indicative, intuitive, mantic, meaningful, monitory, omen, oracular, portent, precursive, precursory, predictional, predictive, predictory, prefigurative, prefiguring, preindicative, premonitory, presage, presageful, presaging, presignificative, presignifying, prognosticative, prophetic, sibyllic, sibylline, significant, vaticinal, vaticinatory, warning, weather-wise