What do you want to learn?

Search 353,402+ words, phrases & grammar rules

📖
Featured Word B1

oculus (noun)

An oculus is a circular opening, typically in the roof or dome of a building, that allows light to enter. It can also refer to the eye of a storm, such as a hurricane, or a specific type of lens or eyepiece.

💡 Memory Tip

Think of an 'O' shape that lets you 'see' (like an eye). O-C-U-L-U-S.

🏛️ Origin

⚠️ Common Mistakes

Using 'oculus' for a square window. → Using 'skylight' or 'window'.

Saying 'a oculus'. → Saying 'an oculus'.

Learn More