gasmask

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WORDNET DICTIONARY

Noun gasmask has 1 sense

gasmask(n = noun.artifact) gas helmet, respirator - a protective mask with a filter; protects the face and lungs against poisonous gases;

is a kind of mask

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CIDE DICTIONARY

gasmask, n.

a mask with a filter which protects the face and lungs against poisonous gases. It is used in warfare, and also by police to allow them to effectively use tear gas or other disabling gas to disperse a crowd or force fugitives to leave a building. [WordNet 1.5]