1) Anorthic 
• (a.) Having, or characterized by, three unequal axes intersecting at oblique angles. See the Note under crystallization.
The least symmetrical crystal system with three axes, no two of which are of equal length and no two of which are perpendicular to one another.
Triclinic refers to a crystal with six faces as parallelograms and three axes of unequal length all inclined to each other. An uncommon form of crystal.
[adj] - (crystallography) having three unequal crystal axes intersecting at oblique angles
(see crystal systems) Crystals forming within this system have no symmetry or just a centre of symmetry. 3 reference axes none of which are at right angles to the others.
anorthic adjective having three unequal crystal axes intersecting at oblique angles; `triclinic system`