Encyclopedia Britannica provides the following definition of Micelle:
"in physical chemistry, a loosely bound aggregation of several tens or hundreds of atoms, ions (electrically charged atoms), or molecules, forming a colloidal particle—i.e., one of a number of ultramicroscopic particles dispersed through some continuous medium. Micelles are important in the chemistry of surfaces—e.g., the power of soap solutions to disperse organic compounds insoluble or only slightly soluble in water is explained as a property of micelles."
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Physiologists and nutritionists know that Micelle formation is essential for the absorption of fat-soluble vitamins and complex lipids within the human body. For example, the liver creates various biliary salts, which are secreted by the gall bladder and allow fatty acid micelle to form. These micelle enable absorption of complicated lipids such as lecithin, and lipid soluble vitamins such as A, D, D and K by the small intestine.