noun hjelm·ite \ˈ(h)yelˌmīt, hēˈel-\
variants: less commonly


\ˈ(h)yelˌmīt, hēˈel-\

Definition of hjelmite



  1. :  a black mineral that contains yttrium, iron, manganese, uranium, calcium, columbium, tantalum, tin, and tungsten oxide, is often metamict, and has uncertain affinities — compare samarskite, tapiolite

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of hjelmite

Swedish hjelmit, from P. J. Hjelm †1813 Swedish chemist + Swedish -it -ite

Seen and Heard

What made you want to look up hjelmite? Please tell us where you read or heard it (including the quote, if possible).


capable of being understood in two ways

Get Word of the Day daily email!