emitter
n.— «Feeder tubes. Often called “emitters” or “drip tape” because it’s sold flattened on a roll, these tubes are made from black polyethylene plastic, with holes spaced at regular intervals to dispense water at a relatively constant rate, even with changes in elevation and water pressure.» —“Maintain a Weedless Organic Garden” by Lee Reich Mother Earth News June-July, 2007. (source: Double-Tongued Dictionary)
Further reading
Need a book to lift you out of this world? Try Orbital (Bookshop|Amazon). In it, Booker-winning novelist Samantha Harvey imagines the moment-to-moment experience of living on a space station, a mixture of the mundane and the majestic, 250 miles...
There was a time when William Shakespeare was just another little seven-year-old in school. Classes in his day were demanding — and all in Latin. A new book argues that this rigorous curriculum actually nurtured the creativity that later flourished...