imagination - the formation of a mental image of something that is not perceived as real and is not present to the senses; popular imagination created a world of demons; imagination reveals what the world could be. imaginativeness, vision. creative thinking, creativeness, creativity - the ability to create.
Definition of the Cortex. Let's explore the cortex layer in more detail. The cortex is defined as root and stem tissue found between the epidermis and vascular tissue of a plant. When you eat potatoes or carrots you are actually eating the root of a plant's cortex.
stem1. 1  the ascending axis of a plant, whether above or below ground, which ordinarily grows in an opposite direction to the root or descending axis. 2  the stalk that supports a leaf, flower, or fruit. 3  the main body of that portion of a tree, shrub, or other plant which is above ground; trunk; stalk.