n. [ LL. defoliare, defoliatum, to shed leaves; L. de- + folium leaf: cf. F. défoliation. ] The separation of ripened leaves from a branch or stem; the falling or shedding of the leaves. [ 1913 Webster ]
2. the act or process of causing plants to lose their leaves, especially by application of a chemical agent. The deliberate defoliation of plants has been used in war (as in Vietnam) to deprive an enemy of cover and allow attack from the air; also, to destroy narcotic-producing plants as a tactic against illegal drug production. The chemical defoliating agents are often sprayed over large areas from airplanes. [ PJC ]
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