Word.ws English Dictionary

fire diamond

fire diamond noun: a coloured diamond symbol identifying the specific risks posed by a hazardous material according to the NFPA 704 classification.

Noun

fire diamond (plural fire diamonds)

  1. (informal) A coloured diamond symbol identifying the specific risks posed by a hazardous material according to the NFPA 704 classification.
    • Many facilities that manufacture, use, or store hazardous materials use the NFPA fire diamond to communicate fire hazards. Indeed, numerous cities have local regulations or ordinances requiring the use of fire diamonds or equivalent communication/warning labels.1999, Gayle Woodside, Hazardous Materials and Hazardous Waste Management, page 133

Forms of fire diamond

pluralfire diamonds

Origin of fire diamond

One of the four divisions of the diamond-shaped symbol indicates flammability.

Questions about fire diamond

What does fire diamond mean?
Fire diamond means a coloured diamond symbol identifying the specific risks posed by a hazardous material according to the NFPA 704 classification.
What part of speech is fire diamond?
Fire diamond is a noun.
What is the plural of fire diamond?
The plural of fire diamond is fire diamonds.

Words near fire diamond in the dictionary

  1. fire dancers
  2. fire department
  3. fire departments
  4. fire devil
  5. fire devils
  6. fire diamond
  7. fire diamonds
  8. fire dog
  9. fire dogs
  10. fire door
  11. fire doors

Source and license

Adapted from Wiktionary: fire diamond (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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