undiscovered
1. [ adjective ] not discovered
Examples:

"with earth-based telescopes many stars remain undiscovered"

Related terms: undetected
2. [ adjective ] not yet discovered
Synonyms: unexplored
Examples:

"undiscovered islands"

Related terms: unknown
Similar spelling:   undiscoverable
  undischarged
  undiscouraged
  undissolved
  undisclosed
  unmedicative
  unaddicted
  undisciplined
  undiscerning