Imagery is a literary device that uses vivid and descriptive language to create a sensory experience in the reader's mind. It appeals to the five senses: sight, smell, taste, touch, and sound.

When an individual conjures up a sensory experience in their own mind, they are engaging in mental imagery. This is a powerful tool that can be used for a variety of purposes, including:

* Improving memory: Visualizing information can help you remember it better.

* Boosting creativity: Imagining new scenarios and ideas can lead to new breakthroughs.

* Reducing stress and anxiety: Focusing on calming images can help to soothe the mind.

* Improving athletic performance: Visualizing successful athletic performances can lead to improved outcomes.

So, "imagery" is the term used to describe the act of conjuring up a sensory experience in one's own mind.