noun. ['ˈpaɪraɪt'] a common mineral (iron disulfide) that has a pale yellow color.
1. Noun, singular or mass It's a lead ore found in sedimentary rock, in association with pyrite and sphalerite. 2. Adverb If there are sparkles, you have found pyrite or fool’s gold. 3. Adjective These cementing agents include pyrite, barite and gypsum.
