1. A rare mineral of resinous luster and high specific gravity. It is a
tantalate of calcium, and occurs in octahedral crystals usually very
minute.
2. (Min.) A minute inclosed crystal, often observed when minerals or
rocks are examined in thin sections under the microscope.
Mi"cro*lith (?), n. [Micro- + lith.] (Min.) Same as Microlite, 2.
Mi`cro*lith"ic (?), a. Formed of small stones.
{ Mi`cro*log"ic (?), Mi`cro*log"ic*al (?), } a. Of or pertaining to
micrology; very minute; as, micrologic examination. --
Mi`cro*log"ic*al*ly, adv.