— sideritic /sid'euh rit"ik/ , adj.
/sid"euh ruyt'/ , n.
1. Also called chalybite . a common mineral, iron carbonate, FeCO 3 , usually occurring in yellowish to deep-brown cleavable masses: a minor ore of iron.
2. a meteorite consisting almost entirely of metallic minerals.
[ 1570-80, in sense "loadstone"; 1845-50 for def. 1; SIDER- + -ITE 1 ; in obs. sense, var. of siderites siderites siderítes loadstone ]