We found 8 dictionaries that define the word gas helmet:

General (7 matching dictionaries)

1. gas helmet: Merriam-Webster
2. gas helmet: Vocabulary.com
3. gas helmet: Dictionary.com
4. gas helmet: Rhymezone
5. gas helmet: FreeDictionary.org
6. gas helmet: Mnemonic Dictionary
7. gas helmet: TheFreeDictionary.com

Computing (1 matching dictionary)

8. gas helmet: Encyclopedia

(Note: See gas_helmets as well.)

Definitions from WordNet (gas helmet) ▸ noun:  a protective mask with a filter; protects the face and lungs against poisonous gases Opposite: gas mask, respirator, air-purifying mask ▸ Words similar to gas helmet ▸ Usage examples for gas helmet ▸ Idioms related to gas helmet ▸ Wikipedia articles (New!) ▸ Words that often appear near gas helmet ▸ Rhymes of gas helmet ▸ Invented words related to gas helmet