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.
cerebral cortex (cortex cerebraÂ´lis) the convoluted layer of gray matter covering each cerebral hemisphere. See also brain. renal cortex the granular outer layer of the kidney, composed mainly of glomeruli and convoluted tubules, extending in columns between the pyramids that constitute the renal medulla.erebral cortex (cortex cerebraÂ´lis) the convoluted layer of gray matter covering each cerebral hemisphere. See also brain. renal cortex the granular outer layer of the kidney, composed mainly of glomeruli and convoluted tubules, extending in columns between the pyramids that constitute the renal medulla.