1. superior planet any of the planets whose orbit lies outside the earth's orbit
  2. superfluous more than is needed, desired, or required
  3. spider plant native to South America but naturalized in warm parts of United States; grown for its long-lasting spider-shaped white to pink-purple flowers
  4. inferior planet any of the planets whose orbit lies inside the earth's orbit
  5. superordinate one of greater rank or station or quality
  6. Periplaneta cosmopolitan genus of large cockroaches
  7. tuberous plant plant growing from a tuber
  8. paper plant tall sedge of the Nile valley yielding fiber that served many purposes in historic times
  9. suborder Blennioidea blennies; butterfishes; gunnels
  10. semaphore plant erect tropical Asian shrub whose small lateral leaflets rotate on their axes and jerk up and down under the influence of sunshine
  11. propellant any substance that moves forward with force
  12. sweet pepper plant plant bearing large mild thick-walled usually bell-shaped fruits; the principal salad peppers
  13. bar-room plant evergreen perennial with large handsome basal leaves
  14. power plant an electrical generating station
  15. slipper plant any of several tropical American shrubby succulent plants resembling cacti but having foot-shaped bracts
  16. spinach plant southwestern Asian plant widely cultivated for its succulent edible dark green leaves
  17. supplant take the place or move into the position of
  18. rubber plant large tropical Asian tree frequently dwarfed as a houseplant
  19. superior court any court that has jurisdiction above an inferior court
  20. superficial of, affecting, or being on or near the surface