Lewis & Short

ĭnaequālĭtas, ātis, f. [2. in-aequalis], unevenness, unlikeness, inequality (not in Cic.).

  1. I. In gen.: togae et tunicae, Varr. L. L. 8, § 28 Müll.: inaequalitate dissident (supercilia), Quint. 11, 3, 79: coloris, id. 12, 9, 17; 11, 3, 43.
    In plur., Col. 3, 12, 3; Plin. 2, 70, 70, § 177.
  2. II. In partic., grammatical irregularity, anomaly, Varr. L. L. 9, § 3 Müll.; Gell. 2, 25, 3.