In its most general sense, a cosmos's an orderly or harmonious system. It originates from a Greek term κόσμος meaning "order, orderly arrangement, ornaments," and's the antithetical concept of chaos. Today the word's generally used as a synonym of the word Universe (considered in its orderly aspect). The words cosmetics and cosmetology originate from the same root. In Russian, the word cosmos simply means "space." Philosophy Pythagoras's said to have been the fir… (More on Cosmos)