eicosapentaenoic acid ei·co·sa·pentaenoicacid uncommon noun 1. an omega-3 fatty acid with 20 carbon atoms; found in fish (especially tuna and bluefish) Synonymseicosapentaenoic acid Related words Broader terms omega-3 fatty acid WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
