- Chem. containing more than one double or triple bond in the molecule
- designating any of certain vegetable and animal fats and oils with a low cholesterol content
Of or relating to long-chain carbon compounds, especially fatty acids, having two or more double bonds between the carbon atoms. Foods containing polyunsaturated fatty acids help reduce blood cholesterol levels and include sunflower, soybean, sesame seed, and corn oils and cold-water fish such as salmon.