E

noun

1.
a fat-soluble vitamin that is essential for normal reproduction; an important antioxidant that neutralizes free radicals in the body
tocopherol vitamin E
2.
a radioactive transuranic element produced by bombarding plutonium with neutrons
atomic number 99 einsteinium Es
3.
the cardinal compass point that is at 90 degrees
due east east eastward
4.
the 5th letter of the Roman alphabet
that e