Syllable division and stress derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
LXXIII is the Roman numeral for 73. WordNet records it as an adjective meaning "being three more than seventy". It carries one recorded sense.
LXXIII=73
Read from the numeral itself, and checked against the entry below — WordNet lists 73 among the synonyms of lxxiii.
Convert any Roman numeralbeing three more than seventy
Definitions, synonyms and semantic relations for lxxiii come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.