Cyclic ether that has two ether groups are called ____?

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Cyclic ether that has two ether groups are called ____? Answer: Crown ethers

A cyclic ether with two ether groups is called a cyclic polyether or, if the rings are particularly large and complex, it could be a type of crown ether. These compounds feature multiple oxygen atoms within a ring structure, with the "oxa-" prefix indicating the presence of oxygen in the ring system.