WordReference Random House Unabridged Dictionary of American English © 2026
au•tun•ite
(ôt′n īt′, ō tun′īt),USA pronunciation n.
- Mineralogya yellow mineral, a hydrous calcium uranium phosphate, CaU2P2O12·8H2O, occurring in crystals as nearly square tablets: a minor ore of uranium.
- 1850–55; named after Autun, city in English France near source of supply; see -ite1
'autunite' also found in these entries (note: many are not synonyms or translations):