defoliant是什么意思？

defoliant

英[ˌdi:ˈfəʊliənt] 美[ˌdiˈfoʊliənt]

• n. <美>脱叶剂，落叶剂；

复数：defoliants;

例句

• Defoliant: Chemical dust or spray applied to plants to cause their leaves to drop off prematurely. 落叶剂: 落叶剂是一种化学粉剂或喷洒剂,施于植物以使树叶提早掉落.
• The crash had spilled a noxious defoliant into the planet's ecology, ravaging the native flora. 这次坠毁将一种有害的落叶剂洒入星球的生态系统中, 破坏着当地的植物群.

柯林斯高阶英汉双解学习词典释义

• N-MASS
  （尤用于战时的）脱叶剂
  A defoliant is a chemical used on trees and plants to make all their leaves fall off. Defoliants are especially used in war to remove protection from an enemy.

英英词典释义

• Noun
  1. a chemical that is sprayed on plants and causes their leaves to fall off