Search Result for "gas helmet":
Wordnet 3.0

NOUN (1)

1. a protective mask with a filter; protects the face and lungs against poisonous gases;
[syn: gasmask, respirator, gas helmet]



WordNet (r) 3.0 (2006):

gas helmet
    n 1: a protective mask with a filter; protects the face and
         lungs against poisonous gases [syn: gasmask,
         respirator, gas helmet]