a system of crop irrigation involving the controlled delivery of water directly to individual plants through a network of tubes or pipes

Colonic irrigation is a medical procedure in which a person's colon is washed by injecting water or other fluids into it.

a ditch that artificially supplies water to an area of dry land

a system of supplying (land) with water by means of artificial canals , ditches , etc, esp to promote the growth of food crops

See drip irrigation