(October 2014) Leukonychia (or leuconychia), also known as white nails or milk spots, is a medical term for white discoloration appearing on nails. It is derived from the Greek words leuko (white) and nychia (nails). The most common cause is injury to the base of the nail (the matrix) where the nail is formed.
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Quick Answer. The main purpose of the U.S. Constitution is to establish the basic rights of all American citizens and provide direction on how the government should work. The Constitution also provides the framework for law and order and describes the roles of the government's federal judiciary branch, legislative branch and executive branch. Keep Learning.