Definition that contains straight line
- ray (mathematics) a straight line extending from a point
- rule measuring stick consisting of a strip of wood or metal or plastic with a straight edge that is used for drawing straight lines and measuring lengths
- element a straight line that generates a cylinder or cone
- pencil a figure formed by a set of straight lines or light rays meeting at a point
- triangle any of various triangular drafting instruments used to draw straight lines at specified angles
- ruler measuring stick consisting of a strip of wood or metal or plastic with a straight edge that is used for drawing straight lines and measuring lengths
- radius a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)
- streak move quickly in a straight line
- alignment the spatial property possessed by an arrangement or position of things in a straight line or in parallel lines
- chord a straight line connecting two points on a curve