E, e

noun, plural E's or Es, e's or es.
the fifth letter of the English alphabet, a vowel.
any spoken sound represented by the letter E or e, as in met, meet, mere, etc.
something having the shape of an E .
a written or printed representation of the letter E or e.
a device, as a printer's type, for reproducing the letter E or e.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Science Dictionary
e   (ē)  Pronunciation Key 
An irrational number, with a numerical value of 2.718281828459.... It is mathematically defined as the limit of (1 + 1/n )n as n grows infinitely large. It is the base of natural logarithms and has many applications in mathematics, especially in expressions involving exponential growth and decay.
  1. The symbol for energy.

  2. The symbol for modulus of elasticity.

The American Heritage® Science Dictionary
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