What is a Half Circle Window Called?

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What is a Half Circle Window Called?

Have you ever seen a window with a curved top that resembles the shape of a half circle? If yes, then you might be wondering what is it called. Let’s dive into this topic and explore the answer.

A half circle window is also known as an arched window. It’s a term used to describe any type of window that has a curved or semicircular shape at the top. People use arched windows for decorative purposes to enhance their house’s architectural design or for functional purposes to let natural light into their homes.

Arched windows have been used in buildings for centuries, and they have evolved since then. In the past, people used to make arched windows using stone materials, while today, manufacturers use different materials such as wood, aluminum, and vinyl.

Arched windows come in different sizes and shapes, depending on the design and purpose. Besides a half circle shape, there are other arched window shapes, such as:

Elliptical Arched Windows

Elliptical arched windows have a flattened curve at the top, similar to the shape of an egg. They have a more elongated appearance compared to half circle windows, which make them ideal for narrow spaces or areas with different proportions.

Cathedral Arched Windows

Cathedral arched windows are inspired by the traditional windows used in churches and cathedrals. They have a sharp point at the top and a curved arch at the bottom, which gives them an elegant and classic look.

Quarter Circle Arched Windows

Quarter circle arched windows are smaller than half circle windows and have a 90-degree angle at the top. They are perfect for accentuating corners or complementing other window styles.

In conclusion, a half circle window is called an arched window. It’s an elegant and versatile design element that can add both aesthetic and functional value to a house. If you’re looking for a unique way to improve your house’s style and increase its natural lighting, consider installing arched windows.

What is a Half Circle Window Called?

Have you ever come across a window that is not a typical square or rectangular shape? If so, you may have wondered what it is called. One such window shape is the half circle window, which is also known by several other names. In this blog post, we will answer some of the most frequently asked questions about what a half circle window is called.

What is a Half Circle Window?

A half circle window is a type of window that is shaped like a half circle. It is typically made by cutting a circular piece of glass in half and then attaching it to a frame. Half circle windows are often used as architectural features on buildings, as they add visual interest and can provide natural light to interior spaces.

What is a Half Moon Window?

A half moon window is another name for a half circle window. This name comes from the shape of the window, which resembles a crescent moon that has been cut in half. Half moon windows are sometimes referred to as demi-lune windows, which is French for “half moon.”

What is an Eyebrow Window?

An eyebrow window is a type of half circle window that is narrower at the top than it is at the bottom. This creates a shape that resembles an eyebrow. Eyebrow windows are often used in architectural styles such as Colonial and Federal.

What is a Fanlight Window?

A fanlight window is a half circle window that is located above a door or window. It is typically divided into smaller sections, which can be either rectangular or curved. Fanlight windows were commonly used in Georgian and Victorian architecture.

What is a Transom Window?

A transom window is a horizontal window that is located above a door or window. It can be either rectangular or half circle in shape. Transom windows were commonly used in architecture during the Victorian era and can provide additional natural light to interior spaces.

How Do Half Circle Windows Compare to Other Window Shapes?

Half circle windows are just one of many window shapes that are available. Here are a few other popular window shapes:

  • Rectangular windows are the most common type of window. They are easy to manufacture and provide a traditional look.
  • Bay windows are a combination of three or more windows that project outward from the wall. They provide an expansive view and can add visual interest to a home’s exterior.
  • Palladian windows have a central arched window that is flanked by two smaller rectangular windows. They are often used in Classical architecture.

What is a Half Circle Window Called? Exploring the World of Arched Windows

Arched windows have been a popular feature in architecture for centuries. They add elegance, style, and a sense of openness to any space. These windows come in various shapes and sizes, each with its own distinct name. In this blog post, we will focus on one type of arched window: the half-circle window.

The Anatomy of a Half Circle Window

Before we dive into the name of this type of window, let’s take a closer look at its anatomy. A half-circle window, as the name suggests, is a semi-circle that sits atop a rectangular frame. The circular portion of the window is called the “head” and the rectangular portion is called the “sill.” The two sides of the window are called “jambs.”

What is a Half Circle Window Called?

Now that we understand the structure of a half-circle window, let’s explore its name. This type of window is known by several names, including:

1. Semi-Circular Window

This name is straightforward and descriptive. “Semi” means half, and “circular” refers to the round shape of the window. This name is commonly used to describe half-circle windows in architectural contexts.

2. Half-Moon Window

This name comes from the crescent shape of the moon, which is similar to the shape of a half-circle window. It’s a popular term in residential construction and interior design.

3. Eyebrow Window

An eyebrow window is a type of half-circle window where the curved portion of the window is smaller than the rectangular portion. The shape of the window resembles an eyebrow. This type of window is commonly used in traditional architecture.

4. Lunette Window

A lunette window is a half-circle window that is often found above a larger window or doorway. The name “lunette” comes from the French word for “little moon”. This type of window is common in classical and Gothic architecture.

Uses of Half Circle Windows

Half-circle windows have a variety of uses and can be found in different locations throughout a building. Some common uses include:

1. Decorative Purposes

Half-circle windows are often used for aesthetic purposes. They add visual interest and architectural detail to a space, and can make a room appear larger and more airy.

2. Natural Light

Because of their shape, half-circle windows allow ample natural light to enter a room. This is especially true when they are placed high up on a wall, as they let in light without sacrificing privacy.

3. Ventilation

While half-circle windows are not typically used for ventilation purposes, they can be designed to open and close. In this case, they would function similarly to standard rectangular windows.

Pros and Cons of Half Circle Windows

Like any architectural feature, half-circle windows have their benefits and drawbacks. Here are some of the most notable pros and cons:


– Add visual interest to a space
– Allow ample natural light
– Can make a room appear larger and more open
– Provide privacy while still letting in light


– Can be expensive to install
– More difficult to cover or dress than standard rectangular windows
– May require specialized cleaning equipment due to their height and shape
– Can be difficult to insulate properly, leading to higher energy costs

Caring for Half Circle Windows

Proper maintenance is essential for any window, but half-circle windows require special attention due to their unique shape and placement. Here are some tips for caring for your half-circle windows:

1. Clean them regularly

Half-circle windows should be cleaned at least once a year, more often in areas with high levels of pollution or dust. Use a soft, non-abrasive cloth and a mild cleaner to avoid scratching the glass.

2. Inspect the sealant

The sealant around the window frame should be inspected regularly to ensure there are no cracks or gaps. Damaged sealant can lead to drafts, increased energy costs, and moisture damage.

3. Check for water damage

Because of their placement high up on a wall, half-circle windows are more vulnerable to water damage than standard rectangular windows. Check for signs of water damage regularly, such as discoloration or peeling paint.

4. Use proper insulation

Insulation is crucial for keeping your home warm in the winter and cool in the summer. Because of their unique shape, half-circle windows may require specialized insulation methods.


A half-circle window is a beautiful and functional addition to any building. Whether you call it a semi-circular, half-moon, eyebrow, or lunette window, this feature provides ample natural light and adds visual interest to a space. With proper care and maintenance, half-circle windows can last for decades and continue to enhance the beauty and functionality of your building.

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What is a Half Circle Window Called?