siv

/S IH1 V/
noun
  1. 1

    (countable) Initialism of special immigrant visa.

  2. 2

    (virology) Initialism of simian immunodeficiency virus. [(virology) A species of retrovirus that causes persistent infections in several species of African non-human primates.]

  3. 3

    (virology) Initialism of swine influenza virus, usually Influenza A virus.