Backwards 3

Perhaps you’ve come across the flipped 3 symbol recently and are curious about its meaning. While it’s commonly used in math and physics, its usage has expanded to other areas. Let’s explore its newer applications below.

In this backward 3 guide, I’ll tell you about the symbol, how to type it on various devices, where it’s used beyond math or physics, its origin, and all you need to know about Epsilon. Get ready for an interesting journey!

The symbol resembling a reversed “3” is commonly known as the Epsilon symbol “Ɛ,” originating from Greek. It is used in Physics, Mathematics, and engineering for various purposes. 

How to Input the Inverted 3 Symbol “Ɛ” in a Word Processor?

Now, let’s explore a different method. I’ll show you how to type the Epsilon symbol in MS Word without using your keyboard, unlike the previous method where we used the keyboard to type the reversed three. Here’s a simple guide to start:

Begin by opening Microsoft Word on your desktop. Then, click on the “Insert” tab in the main menu.

Direct your attention to the symbol option located in the upper right-hand corner. Click on “Symbols,” and you’ll see a small selection of symbols in the drop-down menu.

If you don’t see the inverted three, choose “More symbols.” This will bring up a pop-up window displaying numerous symbols.

Choose the “Cyrillic Supplement” subset. You’ll find the inverted 3 symbol in the pop-up screen. Click on the symbol and then press “Insert” to add it to your document.

How to Input the Inverted 3 Symbol “Ɛ” on Android or iPhone?

Android and iPhone offer numerous features but lack a direct option for typing the inverted 3 symbol. 

To easily input it, copy the “Flipped 3” symbol from above and save it to your phone’s clipboard. Then, create a heart/love sign “Ɛ>” and send it to your loved ones. They’ll appreciate this creative way of expressing love.

How to Input the Inverted 3 Symbol “Ɛ” on Windows or Mac?

Typing the inverted 3 symbol on Windows or Mac is simple. You can use the Character Map on both systems or type the mirrored 3 using Alt Code in Microsoft Word. Another method is provided to ensure you’re familiar with multiple options for typing the flipped 3 symbol.

Here’s how to add a heart symbol in Word. Let’s go through the steps:

Begin by opening a new Google Docs in your Chrome profile, then click on the “Insert” option.

Next, a drop-down menu will appear. Click on “Special Characters” from this menu.

After selecting the “Special Characters” option, a new pop-up will appear on your screen. In this pop-up, you’ll find a search bar. Type “Epsilon” into the search bar.


On the left-hand side, you’ll find several characters, including the “3 mirrored” symbol. Simply select this symbol, and it will be automatically inserted into your document.

Why do people use the reversed three symbol “Ɛ”?

In the past, the reversed three symbol “Ɛ” was commonly used in mathematics, physics, computer science, and engineering. Here’s a complete description of its purpose in these fields.

In Mathematics, the inverted 3, known as Epsilon, is utilized to denote a small positive quantity. It’s also used in set theory to represent an empty set. In mathematical terms, it’s referred to as the E math symbol.

In Physics, the inverted 3 symbol, known as Epsilon, signifies permittivity. Permittivity defines how a substance responds to an electric field.

In Computer Science, the inverted 3 symbol is employed to denote an empty string, which is a string without any characters.

In Engineering, the inverted 3 symbol signifies a small positive number in numerical analysis. It can be represented by a computer’s floating-point system.

Does the inverted 3 symbol “Ɛ” resemble the letter “E”?

Certainly! The inverted 3 symbol bears a striking resemblance of about 85%-90% to the letter “E.” In the mirrored 3, only the corners exhibit curvature, akin to an “E” when flattened.

Moreover, it also bears semblance to an upside-down 3. Some individuals erroneously perceive the Epsilon symbol as a lowercase inverted “E”. However, it’s actually a Greek character derived from flipping the 3 symbols. It’s widely acknowledged as an “E” symbol in mathematical contexts.

In what language is the “backward 3” symbol found?

The origin of the backward 3 symbol traces back to ancient Greek script, where it was depicted as the character “Ɛ” (GREEK SMALL LETTER EPSILON). Over time, this symbol evolved, and the modern iteration, “Ɛ>”, emerged from medieval manuscripts. 

Today, it’s extensively employed as a symbol of affection and endearment, often utilized to express love in various contexts.

The transformation of this symbol reflects the evolution of language and communication, transitioning from its ancient roots to its contemporary usage as a symbol of love and emotion. 

Richard is an experienced tech journalist and blogger who is passionate about new and emerging technologies. He provides insightful and engaging content for Connection Cafe and is committed to staying up-to-date on the latest trends and developments.