Deviating from a general rule, method, or analogy; abnormal; irregular; as, an anomalous proceeding.
TP Wall = Anomalous/contrary to the norm
1. deviating from or inconsistent with the common order, form, or rule; irregular; abnormal: Advanced forms of life may be anomalous in the universe.
2. not fitting into a common or familiar type, classification, or pattern; unusual: He held an anomalous position in the art world.
3. incongruous or inconsistent.
4. Grammar. irregular.
1640–50; (< ML, LL anōmalus) < Gk anmalos irregular, equiv. to an- an- 1 + homalós even, with ō by analogy with other Gk privatives (cf. anopheles ); see homo-, -ous