ei·co·sa·pen·ta·e·no·ic acid .ī-kō-sə-.pen-tə-ē-.nō-ik-, -i-.nō-ik- n an omega-3 fatty acid C20H30O2 found esp. in fish oils abbr. EPA
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(EPA) ei·co·sa·pen·ta·eno·ic ac·id (EPA) (i-ko″sə-pen″tə-e-noґik) [Gr. eikosa twenty + pentaene + -ic] all cis-5,8,11,14,17-eicosapentaenoic acid, an omega-3, polyunsaturated, 20-carbon fatty acid found almost exclusively in fish and marine animal oils; it is a substrate for cyclooxygenase. See also table accompanying fatty acid.Medical dictionary. 2011.