Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
rh-positive is an adjective meaning "of persons (or their blood) having the Rh factor present in their red blood cells". It carries one recorded sense.
of persons (or their blood) having the Rh factor present in their red blood cells
Definitions, synonyms and semantic relations for rh-positive come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. .