NCIt definition : A polyunsaturated long-chain fatty acid with an 18-carbon backbone and exactly three
double bonds, originating from the 6th, 9th and 12th positions from the methyl end,
with all double bonds in the cis- configuration.;
Alternative definition : CRCH: Polyunsaturated fatty acid with 18 carbons and 3 double bonds at the 6th, 9th
and 12th carbons from the methyl end.;