Epsilon Symbol
About Epsilon Symbol
Ε is the Epsilon Symbol, the fifth letter of the Greek alphabet in its uppercase form. Ε denotes an arbitrarily small positive quantity in analysis and the permittivity of free space in electromagnetism.
【Pronunciation】 In English, Ε is most often pronounced EP-suh-lon (IPA: /ˈɛpsɪlɒn/). This is simply the anglicized name of the Greek letter.
The uppercase Epsilon Symbol Ε is written as a distinct capital Greek glyph and is assigned codepoint U+0395 in the Greek and Coptic Unicode block. In plain or sans-serif fonts it can be mistaken for the Latin letter E, so verify the typeface or context.
【Historical Origin】 Like every Greek letter, Ε was adapted from a Phoenician consonant and entered mathematical and scientific notation through the work of ancient Greek scholars, remaining in continuous use to the present day.
【Common Uses】 Ε is highly active across disciplines and frequently appears alongside other Greek capitals such as Δ (Δ), Σ (Σ), Π (Π) and Ω (Ω) in formulas, papers, and engineering drawings. Its clear shape and long tradition make it a standard symbol in many fields.
How to Type Epsilon Symbol
Windows Input
Method 1: Hold Alt and type 917 on the numeric keypad, then release Alt to get Ε.
Mac Input
Method 2: Press Control + Command + Space to open the Character Viewer, search for "greek" or "Epsilon Symbol", then select Ε.
HTML/CSS Input
HTML: Ε or Ε; CSS: content: "\0395";
LaTeX Input
The capital Epsilon Symbol Ε has no dedicated LaTeX command because it is identical to the Latin capital E; simply type E in math mode to produce Ε.
Epsilon Symbol FAQ
How is Ε pronounced?
The English pronunciation of Ε is EP-suh-lon (IPA: /ˈɛpsɪlɒn/). It is the anglicized name of the Greek letter, used directly rather than described as "uppercase Ε".
What is the difference between Ε and the Latin letter E?
Ε (U+0395) is a Greek capital letter, whereas E is a Latin letter; their codepoints and glyphs differ. In a proper typeface Ε and E are clearly distinct, but in plain text or sans-serif fonts they can be confused, so rely on context.
How do I type Ε in Word, web pages, and LaTeX?
On Windows use Alt+917 on the numeric keypad; on Mac open the Character Viewer and search "greek" or "Epsilon Symbol"; on the web use the HTML entity Ε; in LaTeX simply type the letter E.