Siderite(n.) Carbonate of iron, an important ore of iron occuring generally in cleavable masses, but also in rhombohedral crystals. It is of a light yellowish brown color. Called also sparry iron, spathic iron.
Siderite(n.) A meteorite consisting solely of metallic iron.
Siderite(n.) An indigo-blue variety of quartz.
Siderite(n.) Formerly, magnetic iron ore, or loadstone.
Siderite(n.) Any plant of the genus Sideritis; ironwort.

Words within siderites