disco: popular dance music (especially in the late 1970s); melodic with a regular bass beat; intended mainly for dancing at discotheques
popular music: any genre of music having wide appeal (but usually only for a short time)
polyunsaturated fatty acid: an unsaturated fatty acid whose carbon chain has more than one double or triple valence bond per molecule; found chiefly in fish and corn and soybean oil and safflower oil