I. ˈsidəˌrīt, usu -īd+V noun
( -s )
Etymology: sider- + -ite
1.
a. archaic : pharmacosiderite
b. archaic : hornblende
c. archaic : sapphire quartz
d. obsolete : lazulite
e. : holosiderite
2. : a nickel-iron meteorite
II. noun
( -s )
Etymology: German siderit, from sider- + -it -ite
: a native ferrous carbonate FeCO 3 that occurs in rhombohedral crystals often with curved faces, in cleavable or granular masses, and in botryoid and globular forms, that may also contain manganese and magnesium, that is usually light yellowish brown but is sometimes white or gray, that contains 48.2 percent of iron when pure, and that is a valuable iron ore — called also chalybite, sparry iron, spathic iron