Princeton's WordNet

1. vitamin E, tocopherol, E(noun)

   a fat-soluble vitamin that is essential for normal reproduction; an important antioxidant that neutralizes free radicals in the body

   Synonyms:
   tocopherol, east, atomic number 99, eastward, due east, einsteinium, vitamin E

2. einsteinium, Es, E, atomic number 99(noun)

   a radioactive transuranic element produced by bombarding plutonium with neutrons

   Synonyms:
   atomic number 99, east, tocopherol, eastward, due east, einsteinium, vitamin E

3. east, due east, eastward, E(noun)

   the cardinal compass point that is at 90 degrees

   Synonyms:
   east, due east, eastern United States, vitamin E, einsteinium, eastward, atomic number 99, tocopherol

4. e(noun)

   the base of the natural system of logarithms; approximately equal to 2.718282...

   Synonyms:
   tocopherol, east, atomic number 99, eastward, due east, einsteinium, vitamin E

5. E, e(noun)

   the 5th letter of the Roman alphabet

   Synonyms:
   tocopherol, east, atomic number 99, eastward, due east, einsteinium, vitamin E