1. The base of the natural system of logarithms; approximately equal to 2.718282... 
2. The 5th letter of the Roman alphabet
   - E

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

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 E, moj narode E, Gordon Rupp

• serration
• Serratula
• Serratula tinctoria
• serratus
• serratus anterior
• serratus magnus
• serratus muscles
• serratus posterior
• serratus posterior inferior
• serratus posterior superior
• serried
• serrulate
• serry
• Sertoli cell
• Sertoli's cell
• sertraline
• Sertularia
• sertularian
• serum
• serum albumin
• serum disease
• serum globulin
• serum hepatitis
• serum sickness
• serval