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.
biauricular is an adjective meaning "relating to the two auditory openings". It carries one recorded sense.
relating to the two auditory openings
“the biauricular diameter of the skull”
Definitions, synonyms and semantic relations for biauricular come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.