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hard rubber
noun
- rubber vulcanized with a large amount of sulfur, usually 25–35 percent, to render it stiff and comparatively inflexible.
hard rubber
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Word History and Origins
Origin of hard rubber1
First recorded in 1855–60
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Example Sentences
Cutting boards come in three major categories: wood (including bamboo), plastic, and hard rubber.
From The Daily Beast
In a fork of this arm hangs a round, black, trumpet-shaped, hard rubber tube.
From Project Gutenberg
They are made in wood and in hard rubber, the latter being most durable; their uses are so obvious as to require no explanation.
From Project Gutenberg
Drawing squares or T squares, as they are termed, are made of wood, of hard rubber and of steel.
From Project Gutenberg
This consists, in its essentials, of a hard rubber disc provided with a copper or brass segment.
From Project Gutenberg
The hard rubber being a non-conductor of electricity, prevents the flow of the current at all other times.
From Project Gutenberg
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