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DEFINITION: (noun) Excessive desire, especially for wealth. SYNONYMS: covetousness, avarice. USAGE: Their very cupidity was to prove the means of their undoing, in the matter of the ransom at least.

If there is no struggle, there is no progress. Those who profess to favor freedom, and deprecate agitation, are men who want crops without plowing up the ground, they want rain without thunder and lightning.

Nacre, also known as mother-of-pearl, is the iridescent substance that forms the shell lining of some fresh-water and salt-water mollusks. Just like the pearl, it is a mantle tissue secretion and is composed of alternating layers of calcium carbonate and conchiolin. It serves to both smooth the shell and defend it against parasitic organisms and damaging debris. Its iridescent beauty makes it a popular ornamentation in jewelry, watches and guitar inlays. What other decorative uses does it have?