| 单词 | helmet |
| 释义 | Word Frequency helmet(ˈhɛlmɪt) noun 1. a piece of protective or defensive armour for the head worn by soldiers, police officers, firefighters, divers, etc 2. biology a part or structure resembling a helmet, esp the upper part of the calyx of certain flowers Derived forms helmeted (ˈhelmeted) adjective Word origin C15: from Old French, diminutive of helme, of Germanic origin |
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