Merriam-Webster Collegiate Dictionary - parvovirus

 noun  Etymology: New Latin, from Latin parvus small (akin to Greek pauros small, paid-, pais child) + New Latin -o- + virus — more at few  Date: 1965  1. any of a family (Parvoviridae, especially genus Parvovirus) of small single-stranded DNA viruses pathogenic for vertebrates  2. a highly contagious febrile disease of dogs that is caused by a ~ (species Canine ~ of the genus Parvovirus) related to the ~ causing panleukopenia in cats and that is marked by loss of appetite, lethargy, often bloody diarrhea and vomiting, and sometimes death