'Chiastolite' definitions:

Definition of 'Chiastolite'

From: GCIDE

Chiastolite \Chi*as"to*lite\ (k[-i]*[a^]s"t[-o]*l[imac]t), n. [Gr. chiasto`s marked with a [chi] + -lite. See Chiasm. So called from the resemblance of the cross cuts of its crystals to the Greek letter [chi].] (Min.) A variety of andalusite; -- called also macle. The tessellated appearance of a cross section is due to the symmetrical arrangement of impurities in the crystal. [1913 Webster]