Cyclic ether that has two ether groups are called ____?

Cyclic ether that has two ether groups are called ____?

چکرو ایتھر جس میں دو ایتھر گروپس ہیں ____ کہتے ہیں؟
Explanation

Cyclic ethers containing two ether groups are called crown ethers.

These compounds have a ring structure with multiple oxygen atoms, forming a "crown-like" shape that can bind to metal ions.