From Longman Dictionary of Contemporary Englishpanellistpan‧el‧list British English, panelist American English /ˈpænəl-ɪst/ noun [countable] AMone of a group of well-known people who answer questions on a radio or television programme
Examples from the Corpus
panellist• Each panellist can advise on a range of weight problems.From Longman Business Dictionarypanellistpan‧el‧list /ˈpænl-ɪst/ British English, panelist American English noun [countable] someone who is part of a panelConsumer panelists chose the product that they preferred based on flavor, texture, and overall acceptability. 