prognostic
1. [ adjective ] of or relating to prediction; having value for making predictions
Synonyms: predictive prognosticative
Related terms: prophetic
2. [ noun ] a sign of something about to happen
Synonyms: omen prodigy presage prognostication portent
Examples:

"he looked for an omen before going into battle"

Related terms: augury auspice foreboding death_knell bode
Similar spelling:   prognosticate
  prognosis
  prognathic
  pragmatic
  pragmatics
  pragmatical
  pragmatically