The Collaborative International Dictionary of English v.0.48:
Anorthic \A*nor"thic\, a. [See Anorthite.] (Min.) Having unequal oblique axes; as, anorthic crystals. [1913 Webster]WordNet (r) 3.0 (2006):
anorthic adj 1: having three unequal crystal axes intersecting at oblique angles; "triclinic system" [syn: triclinic, anorthic] [ant: monoclinic]