1. A protective mask with a filter; protects the face and lungs against poisonous gases
   - gasmask, respirator

Derived forms: gas helmets

Type of: mask

• countlessness
• countrified
• country
• country and western
• country borage
• country club
• country dancing
• country doctor
• country house
• country music
• country of origin
• country people
• country store
• country-bred
• country-dance
• country-style
• countryfied
• countryfolk
• countryman
• countryseat
• countryside
• countrywide
• countrywoman
• counts/minute
• county