ETYM Greek; a priv. + syn with + metron measure symmetry.
(Mathematics) A lack of symmetry; SYN. imbalance.

ETYM Latin obliquitas: cf. French obliquité.
1. The condition of being oblique; deviation from a right line; deviation from parallelism or perpendicularity.
2. Deviation from ordinary rules; irregularity; deviation from moral rectitude.