drip line

名词 n.
中文释义

英文释义

名词 n.
  1. On the table of nuclides, the limit beyond which an atomic nucleus will immediately decay by emitting a proton or neutron.
    — Hydrogen-7 has so many excess neutrons that it lies beyond the neutron drip line, and will spit out neutrons until it becomes a particle-bound isotope.
  2. The area defined by the outermost circumference of a tree canopy from where water drips onto the ground.
    — 2010, instructions on bottle of Ortho Weed B Gon Max Be particularly careful applying within the drip line of trees and other ornamental species.
  3. A pipe that has small holes at intervals, used to irrigate crops.

词形变化

drip lines plural
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