Term: opal: a translucent mineral consisting of hydrated silica of variable color; some varieties are used as gemstones
Broader: mineral: solid homogeneous inorganic substances occurring in nature having a definite chemical composition | Unrelated: contagious disease: any disease easily transmitted by contact
Broader: mineral: solid homogeneous inorganic substances occurring in nature having a definite chemical composition | Unrelated: satyriasis: abnormally intense sexual desire in men
Broader: mineral: solid homogeneous inorganic substances occurring in nature having a definite chemical composition | Unrelated: crotalus: large rattlesnakes; seldom bite unless startled or pursuing prey
Broader: mineral: solid homogeneous inorganic substances occurring in nature having a definite chemical composition | Unrelated: smith: someone who works metal (especially by hammering it when it is hot and malleable)
Broader: mineral: solid homogeneous inorganic substances occurring in nature having a definite chemical composition | Unrelated: common noun: a noun that denotes any or all members of a class
Broader: mineral: solid homogeneous inorganic substances occurring in nature having a definite chemical composition | Unrelated: oilman: a worker who produces or sells petroleum
Broader: mineral: solid homogeneous inorganic substances occurring in nature having a definite chemical composition | Unrelated: compiler: (computer science) a program that decodes instructions written in a higher order language and produces an assembly language program
Broader: mineral: solid homogeneous inorganic substances occurring in nature having a definite chemical composition | Unrelated: matter: a vaguely specified concern
Broader: mineral: solid homogeneous inorganic substances occurring in nature having a definite chemical composition | Unrelated: trumpet section: the section of a band or orchestra that plays trumpets or cornets
Broader: mineral: solid homogeneous inorganic substances occurring in nature having a definite chemical composition | Unrelated: mallee: any of several low-growing Australian eucalypts