hard rubber

American  

noun

1. rubber vulcanized with a large amount of sulfur, usually 25–35 percent, to render it stiff and comparatively inflexible.

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hard rubber British  

noun

1. a hard fairly inelastic material made by vulcanizing natural rubber See vulcanite

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Etymology

Origin of hard rubber

First recorded in 1855–60

Example Sentences

On June 27, United lost defender Brooks Lennon for six to eight weeks with a knee injury he sustained when he slipped on a hard rubber surface on the edge of Toronto’s playing field.

From Seattle Times

Dr. Ashworth secures a mouth prop over me, a hard rubber tool that disables me from closing my mouth.

From Literature

"Either soft rubber or hard rubber, and/or plastic, and they're used when you don't need a real gun. In other words, it's not going to be firing blanks," he said.

From Fox News

Salmomée Souag, 23, of Portland, Ore., shared a picture showing a hard rubber pellet she found in the street that appeared to be a riot-control device known as a baton round.

From Washington Post

Enter through the back parking lot and you find yourself in a large, darkened room with hard rubber flooring and thick curtains pulled over a floor-to-ceiling mirror at the front of the room.

From Los Angeles Times