An expression from which one derives a mental picture is

The expression from which one derives a mental picture is called imagery. Imagery refers to the use of figurative language, such as descriptive words and phrases, to create a mental image in the reader's mind. This technique allows the reader to vividly imagine the scene being described and can enhance the overall meaning and impact of the text. Examples of imagery include descriptions of sights, sounds, smells, tastes, and textures.