hard rubber

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noun

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

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Origin of hard rubber

First recorded in 1855–60

Words nearby hard rubber

hard-pressed, hard-put, hard right, hard rock, hard row to hoe, hard rubber, hards, hard sauce, hardscape, hard science, hardscrabble

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use hard rubber in a sentence

We put an extra foot of height in the basement ceiling, we’ll put a bathroom down there, and you create a true home gym with a hard rubber floor and a mirrored wall and a ballet bar for bar classes.
Toll Brothers CEO Doug Yearley on Where Americans Are Moving During the Pandemic|Eben Shapiro|January 10, 2021|Time
Cutting boards come in three major categories: wood (including bamboo), plastic, and hard rubber.
The Dirty Truth About Cutting Boards|Chad Ward|September 1, 2009|DAILY BEAST
In a fork of this arm hangs a round, black, trumpet-shaped, hard rubber tube.
Steam Steel and Electricity|James W. Steele
They are made in wood and in hard rubber, the latter being most durable; their uses are so obvious as to require no explanation.
Mechanical Drawing Self-Taught|Joshua Rose

Drawing squares or T squares, as they are termed, are made of wood, of hard rubber and of steel.
Mechanical Drawing Self-Taught|Joshua Rose
This consists, in its essentials, of a hard rubber disc provided with a copper or brass segment.
The Gasoline Motor|Harold Whiting Slauson
The hard rubber being a non-conductor of electricity, prevents the flow of the current at all other times.
The Gasoline Motor|Harold Whiting Slauson

British Dictionary definitions for hard rubber

hard rubber

noun

a hard fairly inelastic material made by vulcanizing natural rubberSee vulcanite

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012