macle

Etymology
Borrowed from, which in turn derives either from (from 🇨🇬) or from  (from 🇨🇬). See for more.

Noun

 * 1)  Chiastolite; so called from the tessellated appearance of a cross-section.
 * 2)  A crystal having a similar tessellated appearance.
 * 3)  A twin crystal.

Etymology
The second sense is from, from (see 🇨🇬 for details). The first sense either has the same origin, or derives from (from 🇨🇬).

Noun

 * 1) twin crystal
 * 2)  mascle