E
     n 1: a fat-soluble vitamin that is essential for normal
          reproduction; an important antioxidant that neutralizes
          free radicals in the body [syn: {vitamin E}, {tocopherol}]
     2: a radioactive transuranic element produced by bombarding
        plutonium with neutrons [syn: {einsteinium}, {Es}, {atomic
        number 99}]
     3: the cardinal compass point that is at 90 degrees [syn: {east},
         {due east}]
     4: the base of the natural system of logarithms [syn: {2.718282...}]
     5: the 5th letter of the Roman alphabet
Source: WordNet® 2.0