n.a metallic conductor that is attached to a high point and leads to the ground; protects the building from destruction by lightning
同义词：lightning rodlightning conductor
英汉双解大词典
lightning conductor
1.
N（名词）
A lightning conductor is a long thin piece of metal on top of a building that attracts lightning and allows it to reach the ground safely. 避雷针; 在建筑物上的长而尖的针，能引来闪电并使之安全到达地面 [英国英语]