Definitions
1.NounAgent noun of force.
2.NounThe solid piston of a force pump; the instrument by which water is forced in a pump.
3.NounA small hand pump for sinking pits, draining cellars, etc.
4.NounA bell-shaped lidded pot for growing rhubarb, used to limit photosynthesis by excluding light, encouraging early-season growth and blanched stems.