Epsilon - Definition and Overview

Epsilon (upper case Ε, lower case ε) is the 5th letter of the Greek alphabet. In the system of Greek numerals it has a value of 5.

Epsilon is the lowest and least intelligent caste in Aldous Huxley's dystopic satire Brave New World.

The lower-case letter ε is used as the symbol for:

• A very small quantity in mathematics.
• The precision of a numeric data type in computing.
• The empty string in computer science.
• The Levi-Civita symbol in mathematics.
• Set membership in mathematics.
• The permittivity of a medium in physics.

There is a company that has this name:

• Epsilon S.A - studio company

Letters that arose from Epsilon include the Roman E.