psychiatry

Noun

Psychiatry is a type of science. It studies mental illnesses, like depression and anxiety.
By studying psychiatry, scientists have found new medicines that help people with depression.

Before psychiatry existed, people thought that mental illnesses were caused by the devil or evil spirits.
Psychiatry is a special type of medicine (health care) that treats people with mental illnesses.
The doctor at the hospital decided to call the department of psychiatry for her patient. She thought psychiatry could help him with his depression.