arsenopyrite

noun

ar·​se·​no·​py·​rite ˌär-sə-nō-ˈpī-ˌrīt 

: a silver-white mineral consisting of a combined sulfide and arsenide of iron that occurs in prismatic orthorhombic crystals or in masses or grains and that is the principal source of arsenic

Word History

Etymology

borrowed from German Arsenopyrit, borrowed from New Latin arsenopyrites, from arsenicum arsenic entry 1 + -o- -o- + pyrites pyrites

First Known Use

1854, in the meaning defined above

Kids Definition

arsenopyrite

noun

ar·​se·​no·​py·​rite ˌärs-ᵊn-ō-ˈpī-ˌrīt 

: a hard bluish or grayish white mineral consisting of iron, arsenic, and sulfur