Emily Dickinson Lexicon

SID'ER-ITE, n. [L. sideritis; Gr. id. from σιδηρος, iron.]

1. The lodestone; also, iron-wort, a plant; also, the common ground pine [Teucrium chamæpitys, Linn.] – Coxe. Encyc. Parr.
2. In mineralogy, a phosphate of iron. – Lavoisier. Fourcroy.