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HAZMAT

American  
[haz-mat] / ˈhæzˌmæt /
Or hazmat

noun

  1. a material or substance that poses a danger to life, property, or the environment if improperly stored, shipped, or handled.

    regulations for transporting radioactive materials and other HAZMAT.
hazmat British  
/ ˈhæzˌmæt /

noun

    1. substances that pose a danɡer to public health

    2. ( as modifier )

      a hazmat suit
"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of HAZMAT

An Americanism dating back to 1970–75; haz(ardous) + mat(erial)

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.