Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A substance that irritates the nasal and respiratory passages and causes coughing, sneezing, lacrimation, and sometimes vomiting.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a chemical substance that causes sneezing and coughing and crying

Etymologies

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