drip line

Noun

 * 1)  On the table of nuclides, the limit beyond which an atomic nucleus will immediately decay by emitting a proton or neutron.
 * 2) The area defined by the outermost circumference of a tree canopy from where water drips onto the ground.
 * 3) * 2010, instructions on bottle of Ortho Weed B Gon Max
 * Be particularly careful applying within the drip line of trees and other ornamental species.
 * 1) A pipe that has small holes at intervals, used to irrigate crops.
 * 1) A pipe that has small holes at intervals, used to irrigate crops.