The ⊙ Symbol: Meaning, Uses, and How to Type the Circled Dot

The ⊙ symbol, officially known as the Circled Dot Operator (U+2299), is a versatile mathematical character most commonly used to represent the Hadamard product in linear algebra. Beyond mathematics, physicists rely on it to indicate an outward-pointing vector, astronomers use it as a shorthand for the Sun, and internet users frequently repurpose it in text art to create surprised expressions like (⊙_⊙).

Originally designed for complex mathematical formulas, the circled dot provides a clear visual distinction from standard multiplication dots or asterisks. In linear algebra, it denotes the element-wise multiplication of two matrices. If you dive into physics, the symbol takes on a spatial meaning. It represents a 3D vector pointing directly out of the page toward the reader. You can easily visualize this by imagining the sharp tip of an arrow flying directly at you.

This character lives in the Mathematical Operators block and was added to the Unicode Standard in version 1.1 back in 1993. Its official Unicode code point is U+2299.

While ⊙ is deeply rooted in academia, it gets plenty of screen time in everyday digital communication. Because it looks exactly like a wide eye with a pupil or a minimalist bullseye, people use it to build classic kaomoji and text-based emoticons. A simple pair of circled dots easily conveys shock, confusion, or a blank stare on social media. Programmers and researchers also frequently encounter the symbol in LaTeX, where the \odot command renders it perfectly for scientific papers.

Typing the ⊙ symbol depends on your device and operating system. On Windows, you can hold down the Alt key and type 8857 on your numeric keypad. Mac users can switch to the Unicode Hex Input keyboard layout and press Option + 2299. If you are building a website, you can drop it right into your HTML using the ⊙ entity code. For mobile users on iOS or Android, the fastest method is simply copying and pasting the symbol from a webpage.

Several other Unicode characters share a similar design but serve entirely different purposes. The Circled Times symbol (⊗) is its direct counterpart in physics, representing a vector pointing away from you, like the tail feathers of a retreating arrow. The Circled Plus (⊕) denotes a direct sum in mathematics. If you need a symbol specifically for astrology or the solar system, the Sun symbol (☉) at U+2609 is the astronomically correct choice, even though ⊙ remains widely accepted as a stand-in for solar mass equations.