macro tunnel
 n.— «“Macro tunnels” are like miniature, traditional greenhouses. Shallow dirt canals are dug into the soil to use as walkways and slopes between act as elevated planting beds. The tunnels are then covered with a tarp in the same dome-style fashion as larger greenhouses.» —“Tomato, Tom-ah-to – No Matter How You Say It, Greenhouse Project Increases Harvest and Family Income” MarketWarch Dec. 4, 20008. (source: Double-Tongued Dictionary)

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