E (noun)
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, E]
2: a radioactive transuranic element produced by bombarding plutonium with neutrons [syn: einsteinium, Es, E, [[atomic number 99]]]
3: the cardinal compass point that is at 90 degrees [syn: east, due east, E]
4: the base of the natural system of logarithms [syn: 2.718282...]
5: the 5th letter of the Roman alphabet [syn: E]