1. rock pigeon pale grey Eurasian pigeon having black-striped wings from which most domestic species are descended
  2. rock python very large python of tropical and southern Africa
  3. rock pink pink-flowered perennial of rocky regions of western United States
  4. Rhizopogon a genus of fungi having subterranean sporophores resembling tubers
  5. Tragopogon genus of Old World herbs with linear entire leaves and yellow or purple flower heads
  6. wood pigeon Eurasian pigeon with white patches on wings and neck
  7. carrier pigeon a homing pigeon used to carry messages
  8. clay pigeon target used in skeet or trapshooting
  9. pigeon wild and domesticated birds having a heavy body and short legs
  10. cabochon a highly polished gem that is cut convexly but without facets
  11. capuchin a hooded cloak for women
  12. go back on fail to fulfill a promise or obligation
  13. ragpicker an unskilled person who picks up rags from trash cans and public dumps as a means of livelihood
  14. rock plant plant that grows on or among rocks or is suitable for a rock garden
  15. curmudgeon an irascible, cantankerous person full of stubborn ideas
  16. rock wren wren inhabiting badlands and mesa country of western United States and Mexico
  17. rocklike hard as granite
  18. radio beacon a radio station that broadcasts a directional signal for navigational purposes
  19. homing pigeon pigeon trained to return home
  20. stool pigeon someone acting as an informer or decoy for the police