noun
molybdenite
A mineral composed of molybdenum disulfide; the primary ore of molybdenum. Used in geology and mineralogy contexts.
輝水鉛鉱はモリブデンの主要な鉱石である。
Molybdenite is the principal ore of molybdenum.
Compound of 輝 (ki, 'shine') + 水鉛 (suien, 'molybdenum') + 鉱 (kō, 'ore'). The exact historical derivation is uncertain; the spelling is conventionally associated with the mineral's appearance and composition.