Castor Very Common

a multiple star with 6 components; second brightest in Gemini; close to Pollux

"The amateur astronomer spent hours adjusting his telescope to resolve the six distinct points of light that make up the castor system near Pollux."

a shaker with a perforated top for sprinkling powdered sugar

"She reached for the castor to dust the donuts with powdered sugar before serving them."

a pivoting roller attached to the bottom of furniture or trucks or portable machines to make them movable

"The handyman installed four rubber castors under the antique dresser so it could glide easily across the hardwood floor."

a hat made with the fur of a beaver (or similar material)

"He pulled off his old castor to wipe away the soot from his face before stepping into the warm shop."

type genus of the Castoridae: beavers

"The castor species in North America is known for building elaborate dams across rivers."

A hat made from the fur of the beaver.

"The antique furniture piece was so old that it had been restored with castor wheels instead of modern nylon ones."

A variety of petalite found in Elba.

"I finally replaced the heavy castor wheels on my bookshelf, making it easy to slide out from under the desk."

Alternative spelling of caster, especially in its senses

A pivoting roller attached to the bottom of furniture to allow it to be moved.