Definition of substitution. 1  1a : the act, process, or result of substituting one thing for anotherb : replacement of one mathematical entity by another of equal value. 2  2 : one that is substituted for another.
Homogenized milk is any sort of milk that has been mechanically treated to ensure that it has a smooth, even consistency. The homogenization process typically involves high temperatures, agitation, and filtration, all aimed at breaking down milk's naturally occurring fat molecules.
1 A Holstein's spots are like fingerprints-no two cows have the exact same pattern of spots. 2  Cow's provide 90% of the world's milk supply. 3  The average mature dairy cow weighs approximately 1,500 pounds. A Holstein's spots are like fingerprints-no two cows have the exact same pattern of spots. 2  Cow's provide 90% of the world's milk supply. 3  The average mature dairy cow weighs approximately 1,500 pounds.