E

/'iədrɔps/
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Thân thiện
Definition
  1. Noun:
    • The fifth letter of the Roman alphabet: "E" is the fifth letter in the modern English alphabet and the Latin script.
    • A mathematical constant: "e" is the base of the natural logarithm, an irrational and transcendental number approximately equal to 2.71828.
    • A cardinal direction: "E" is the abbreviation for the cardinal compass point East, which is at 90 degrees on a compass.
    • A chemical element: "E" is the symbol for einsteinium, a synthetic, radioactive transuranic element.
    • A vitamin: "E" refers to Vitamin E, a group of fat-soluble compounds that act as antioxidants.
Usage Examples
  • Noun:
    • The word "example" begins with the letter e.
    • The mathematical constant e is fundamental to calculus.
    • The map indicated that the city was located to the E.
    • The scientist studied the properties of the element e (einsteinium).
    • Foods like almonds and spinach are rich in Vitamin E.
Advanced Usage
  • In mathematics: "e" is often used in formulas for exponential growth, compound interest, and complex analysis.
    • The function f(x) = e^x is its own derivative.
  • In computing: "E" or "e" can be used as a variable name or in scientific notation.
    • The program stored the value as 1.6e-19.
  • In music: "E" is the name of a musical note, the third note in the C major scale.
Variants and Related Words
  • E- (prefix): Used to denote electronic or internet-based versions of things.
    • e-commerce, e-mail
  • E (abbreviation): Can stand for various terms like "energy" (in physics) or "exa-" (a prefix in the metric system denoting 10^18).
Synonyms
  • East: For the cardinal direction.
  • Einsteinium: For the chemical element (symbol Es).
  • Vitamin E: For the nutrient (also called tocopherol).
Related Phrases
  • E = mc²: Albert Einstein's famous mass-energy equivalence formula from the theory of relativity.
  • E-ticket: Originally a paperless airline ticket, now often refers to any electronic pass or reservation.
Noun
  1. the 5th letter of the Roman alphabet
  2. the base of the natural system of logarithms; approximately equal to 2.718282...
  3. the cardinal compass point that is at 90 degrees
  4. a radioactive transuranic element produced by bombarding plutonium with neutrons
  5. a fat-soluble vitamin that is essential for normal reproduction; an important antioxidant that neutralizes free radicals in the body

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