Longman Dictionary English From Longman Dictionary of Contemporary EnglishRelated topics: Illness & disabilityvirologyvi‧rol‧o‧gy /vaɪəˈrɒlədʒi $ vaɪˈrɑː-/ noun [uncountable] MIthe scientific study of viruses or of the diseases caused by them —virologist noun [countable] ldoceonline.com