natural glass

1. Magma of any composition that cooled very rapidly (synset 114903756)
   is a type of: glass - a brittle transparent solid with irregular atomic structure
   subtypes:

   • crystal, lechatelierite, quartz, quartz glass, vitreous silica - colorless glass made of almost pure silica
   • tektite - thought to derive from meteorites

Other Searches

• Rhyme: Dillfrog, RhymeZone
• Definition: Wiktionary, Dictionary.com, Wikipedia, Merriam-Webster, WordNet, Power Thesaurus
• Imagery: Google, Flickr, Bing