chlo·rite 1 (klôr'īt', klōr'-) n. A generally green or black secondary mineral, (Mg,Fe,Al)6(Si,Al)4O10(OH)8, often formed by metamorphic alteration of primary dark rock minerals, that appears as a spot of green and resembles mica.
[Latin chlōrītis, a green precious stone, from Greek khlōrītis, from khlōros, green; see ghel-2 in Indo-European roots.] chlo·rit'ic (klôr-ĭt'ĭk, klōr-) adj.