Tau Symbol
About Tau Symbol
Τ is the Tau Symbol, the nineteenth letter of the Greek alphabet in its uppercase form. Τ denotes torque in mechanics, the tau lepton in particle physics, and is proposed as an alternative to 2π in trigonometry.
【Pronunciation】 In English, Τ is most often pronounced TAU (IPA: /taʊ/). This is simply the anglicized name of the Greek letter.
The uppercase Tau Symbol Τ is written as a distinct capital Greek glyph and is assigned codepoint U+03A4 in the Greek and Coptic Unicode block. In plain or sans-serif fonts it can be mistaken for the Latin letter T, so verify the typeface or context.
【Historical Origin】 Like every Greek letter, Τ 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】 Τ 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 Tau Symbol
Windows Input
Method 1: Hold Alt and type 932 on the numeric keypad, then release Alt to get Τ.
Mac Input
Method 2: Press Control + Command + Space to open the Character Viewer, search for "greek" or "Tau Symbol", then select Τ.
HTML/CSS Input
HTML: Τ or Τ; CSS: content: "\03A4";
LaTeX Input
The capital Tau Symbol Τ has no dedicated LaTeX command because it is identical to the Latin capital T; simply type T in math mode to produce Τ.
Tau Symbol FAQ
How is Τ pronounced?
The English pronunciation of Τ is TAU (IPA: /taʊ/). It is the anglicized name of the Greek letter, used directly rather than described as "uppercase Τ".
What is the difference between Τ and the Latin letter T?
Τ (U+03A4) is a Greek capital letter, whereas T is a Latin letter; their codepoints and glyphs differ. In a proper typeface Τ and T are clearly distinct, but in plain text or sans-serif fonts they can be confused, so rely on context.
How do I type Τ in Word, web pages, and LaTeX?
On Windows use Alt+932 on the numeric keypad; on Mac open the Character Viewer and search "greek" or "Tau Symbol"; on the web use the HTML entity Τ; in LaTeX simply type the letter T.