helmet

名词 helmet:

1. armor plate that protects the head
2. a protective headgear made of hard material to resist blows

1. A cloth band or scarf wrapped around the crown of a hat or sun helmet.
   头巾缠绕在礼帽或遮阳帽帽冠周围的布条或三角巾
2. A medieval light helmet with a neck guard and movable visor.
   头盔中世纪有护颈和活动护面的轻便头盔
3. Jerry: I never had a beard. I kept my hair inside the helmet.
   杰端：我以前是从不留胡子，我头发是在头盔里。
4. These policemen wear helmets to protect them.
   这些警察戴着头盔保护自己。

hel.met

n.（名词）

A head covering of hard material, such as leather, metal, or plastic, worn by football players, firefighters, construction workers, motorcyclists, and others to protect the head.
头盔：由坚硬材料如皮革、金属或塑料制成的头部覆盖物，由橄榄球队员、消防队员、建筑工人、摩托车骑手或其他人配戴，用以保护头部
The headgear with a glass mask worn by deep-sea divers.
（潜水）头盔：由深水潜水员戴的带有玻璃面罩的帽盔
A pith helmet; a topi.
遮阳帽：干木髓做的太阳帽；软木帽
A head covering, such as a balaclava, that is shaped like a helmet.
帽盔：一种形状象头盔的头部覆盖物，如巴拉克拉瓦盔式帽
A piece of armor, usually made of metal, designed to protect the head.
盔甲：一件盔甲，通常由金属制成，设计用于保护头部
Botany The hood-shaped sepal or corolla of some flowers.
【植物学】 盔状花冠（或花萼）：某些花朵盔状的花萼或花冠
v.tr.intr.（及物动词和不及物动词）
hel.met.ed,hel.met.ing,hel.mets
To provide with or put on a helmet.
给…提供（或配戴）头盔

来源：
Middle English
中古英语
from Old French [diminutive of] helme
源自 古法语 [] helme的小后缀
[of Germanic origin] * see kel-
[日尔曼语源的] *参见 kel-

【引伸】
hel.meted
adj.（形容词）