Definition of "magnesium" in English

noun

1. The chemical element with an atomic number of 12. It is a light, easily flammable, silvery-white alkaline earth metal.

   • 1999, Chapter 1 "Barrens" Cryptonomicon by Neal Stephenson The building looked only like a wall glowing in the firelight, but sometimes a barrage of magnesium blue light made its windowframes jump out of the darkness.