1. The 5th letter of the Roman alphabet
   - E
    
2. The base of the natural system of logarithms; approximately equal to 2.718282 …
    
3. The electric charge of a single proton (equal to minus the charge on an electron); defined as exactly 1.602176634 x 10^-19 coulombs
   - elementary charge

1. A radioactive transuranic element produced by bombarding plutonium with neutrons
   - einsteinium, Es, atomic number 99
    
2. The cardinal compass point that is at 90 degrees
   - east, due east, eastward
    
3. A fat-soluble vitamin that is essential for normal reproduction; an important antioxidant that neutralizes free radicals in the body
   "Almonds are rich in vitamin E";
   - vitamin E, tocopherol

Derived forms: es, Es

Type of: alphabetic character, antioxidant, cardinal compass point, fat-soluble vitamin, letter, letter of the alphabet, metal, metallic element, transcendental number

Part of: Latin alphabet, Roman alphabet

Encyclopedia: E, Gordon Rupp