omega-3 fatty acid: a polyunsaturated fatty acid whose carbon chain has its first double valence bond three carbons from the beginning
fatty acid: any of a class of aliphatic monocarboxylic acids that form part of a lipid molecule and can be derived from fat by hydrolysis; fatty acids are simple molecules built around a series of carbon atoms linked together in a chain of 12 to 22 carbon atoms
fang: hollow or grooved tooth of a venomous snake; used to inject its poison