Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
anomalousness is a noun meaning "deviation from the normal or common order or form or rule". It carries one recorded sense.
deviation from the normal or common order or form or rule
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for anomalousness come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.