epidemic myalgia epi·de·mic·myalgia uncommon noun 1. an acute infectious disease occurring in epidemic form and featuring paroxysms of pain (usually in the chest) Synonymsepidemic pleurodyniaepidemic myalgiamyosisdiaphragmatic pleurisyBornholm disease Related words Broader terms epidemic disease WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.