obsidian

plural obsidians

1. uncountableusuallychemistryA type of naturally occurring black glass produced by volcanoes.

   The Neolithic culture from 8000 to 6000 B.C., however, was a brilliant period of the revival of crafts, the transformation of gathering into gardening, the growth of a cross-cultural obsidian trade, and the rise of towns.

   1981, William Irwin Thompson, The Time Falling Bodies Take to Light: Mythology, Sexuality and the Origins of Culture, London: Rider/Hutchinson & Co., page 130

   Synonyms: obby

2. uncountableusuallyA slightly bluish black, the color of obsidian glass.

comparative more obsidian · superlative most obsidian

1. poeticBlack.

   Looks like a yellow biscuit of a buttery cue ball moon / Rolling maverick across an obsidian sky

   1975, “Nighthawk Postcards (From Easy Street)”, in Nighthawks at the Diner, performed by Tom Waits