ClipArt ETC
A large circular shield with a convex outer and concave inner surface.

Clypeus

A large circular shield with a convex outer and concave inner surface.

This illustration shows a rock made up of flattened or disk-shaped concretions.

Concretionary Structure

This illustration shows a rock made up of flattened or disk-shaped concretions.

"The metal cut away near the center reduces the weight and provides passages for air circulation." — Hawkins, 1917

Solid core disk

"The metal cut away near the center reduces the weight and provides passages for air circulation." —…

Illustration of a thin hollow cylinder. It resembles a washer and is often referred to as a disc.

Hollow Cylinder

Illustration of a thin hollow cylinder. It resembles a washer and is often referred to as a disc.

Illustration of a narrow right circular cylinder (with the height much smaller than the diameter) resting on its side/edge. This could also be described as a round disc.

Narrow Cylinder on Side

Illustration of a narrow right circular cylinder (with the height much smaller than the diameter) resting…

Illustration of 2 narrow right circular cylinders with equal heights (thickness) and different diameters. Both cylinders (discs) are resting on a side/edge.

2 Narrow Cylinders on Their Sides

Illustration of 2 narrow right circular cylinders with equal heights (thickness) and different diameters.…

A hand holding a disk connected to a stick.

Hand with disk

A hand holding a disk connected to a stick.

"Make a 'Newton disk', painting the prismatic colors in proper proportion as indicated." — Avery, 1895

Newton disk

"Make a 'Newton disk', painting the prismatic colors in proper proportion as indicated." — Avery,…

Palafoxia hookeriana flowers are freely produced in loose clusters. The stems are very bushy and about two feet high. The flowers are rosy pink.

Palafoxia Hookeriana

Palafoxia hookeriana flowers are freely produced in loose clusters. The stems are very bushy and about…

A flattish ring of iron, used in playing a kind of game.

Quoit

A flattish ring of iron, used in playing a kind of game.

"In wood-working, a saw in which the cutting-teeth are placed at the ends of radial arms instead of upon he rim of a disk." -Whitney, 1911

Rift Saw

"In wood-working, a saw in which the cutting-teeth are placed at the ends of radial arms instead of…

A wheel is a circular device that is capable of rotating on its axis, facilitating movement or transportation while supporting a load, or performing labor in machines. Common examples are found in transport applications.

Eight Spoke Wheel

A wheel is a circular device that is capable of rotating on its axis, facilitating movement or transportation…

"...represents a very valuable attachment for the whirling table. A ball of known mass slides on a horizonal wire. To this ball is attached a flexible cord that turns around a pulley at the bottom, divides into two, passes over the pulleys at the top, and carries adjustable and slotted disk weights." -Avery 1895

Attachment for the Whirling Table

"...represents a very valuable attachment for the whirling table. A ball of known mass slides on a horizonal…