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.
cortex - the tissue forming the outer layer of an organ or structure in plant or animal. animal tissue - the tissue in the bodies of animals. adrenal cortex - the cortex of the adrenal gland; secretes corticosterone and sex hormones.