over a long time; serious characterized by concepts or the forming of concepts a 3D shape with a circular base; a part of the eye the need of someone or something the act of discovering something the distance across the center of an object the process of emerging/coming out plain, clear very clear; nothing hidden flat or level part of something to talk and do things with other people the smallest possible about the nerves or nervous system a living thing to cover something else a part that sticks out; an image on a screen; a prediction a person or thing acting or serving in place of another; (v.) to put (a person or thing) in the place of another. building something complex from simple parts having a system or plan