glow plug

glow-plug的词性：
n.（名词）

1. A small electric heating element in an internal-combustion engine that facilitates starting by preheating the air in a cylinder and is used especially in diesel engines.
电热塞：装在内燃发动机内的小电热器，用以预热气缸内的空气以利发动，尤用于柴油发动机