Noun
sprinkler head (plural sprinkler heads)
A heat-activated device that sprays water in the event of a fire, usually mounted on a ceiling.
Synonyms: sprinkler, fire sprinkler
Coordinate terms: drencher, fire extinguisher
Once there is no more water pressure in the lateral line, the sprinkler head will retract back into the ground. Source: Internet
Most center pivot systems now have drops hanging from a u-shaped pipe attached at the top of the pipe with sprinkler head that are positioned a few feet (at most) above the crop, thus limiting evaporative losses. Source: Internet
Localized irrigation Impact sprinkler head Localized irrigation is a system where water is distributed under low pressure through a piped network, in a pre-determined pattern, and applied as a small discharge to each plant or adjacent to it. Source: Internet