1. learning ability mental ability
  2. running back (football) a back on the offensive team (a fullback or halfback) who tries to advance the ball by carrying it on plays from the line of scrimmage
  3. learning curve a graph showing the rate of learning
  4. bearing brass a brass bushing or a lining for a bearing
  5. learning the cognitive process of acquiring skill or knowledge
  6. lightning bug a flying, nocturnal beetle that produces a luminescent glow
  7. draining board a board beside a kitchen sink and inclined to drain into the sink
  8. coloring book a picture book with line drawings intended to be colored with crayons by children
  9. pruning hook a long-handled pruning saw with a curved blade at the end and sometimes a clipper; used to prune small trees
  10. warning bell a bell used to sound an alarm
  11. earnings something that remunerates
  12. turning point an event marking a unique or important historical change of course or one on which important developments depend
  13. mourning band a black band worn by a man as a sign of mourning
  14. running board a narrow footboard serving as a step beneath the doors of some old cars
  15. ironing board narrow padded board on collapsible supports
  16. morning sickness nausea early in the day
  17. morning dress formal attire for men during the daytime
  18. burning bush (Old Testament) the bush that burned without being consumed and from which God spoke to Moses
  19. running noose a loop formed in a cord or rope by means of a slipknot
  20. morning coat a man's full-dress jacket with two long tapering tails at the back