Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
hsv-2 is a noun meaning "a herpes virus that can cause genital herpes". It carries one recorded sense.
a herpes virus that can cause genital herpes
Definitions, synonyms and semantic relations for hsv-2 come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.