Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
right-handedness is a noun meaning "preference for using the right hand". It carries one recorded sense.
preference for using the right hand
Definitions, synonyms and semantic relations for right-handedness come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.