ANOM'ALOUS, adjective Irregular; deviating from a general rule, method or analogy; applied, in grammar, to words which deviate from the common rules of inflection; and in astronomy, to the seemingly irregular motions of the planets; but applied also generally to whatever is irregular; as, an anomalous character; anomalous pronunciation.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI