hard rubber
noun
: a firm rubber or rubber product
especially : a normally black horny substance made by vulcanizing natural rubber with high percentages of sulfur
Example Sentences
Recent Examples on the Web Organic solvents can dissolve latex from other plant material, creating a hard rubber mass ready for tires. 
Kevin Purdy, Ars Technica, 8 Sep. 2022 Carbon disulfide, used in hard rubber, viscose rayon, and cellophane, harmed generations of workers yet remains in use, notes Paul Blanc, a professor of medicine at UC San Francisco who has written about this history. Rebecca Altman, The Atlantic, 15 Mar. 2022 The array tiny hard rubber lugs on the outsole of the forefoot helps keep the weight down and provide exceptional traction on both wet and dry surfaces. Brian Metzler, Outside Online, 28 Sep. 2020 The ball used in the game is a hard rubber one that bounces well and can be thrown from stick to stick and eventually shot into the goal. Chris Hachey, BGR, 25 Mar. 2021 Made of hard rubber or plastic, soft spikes provide traction on wet or soft turf without damaging the green. Angela Watson, chicagotribune.com, 28 Feb. 2021 The door and center armrests in front feel like hard rubber, the small LCD gauges in the dash are unreadable through polarized sunglasses, and the door pockets are tiny. Patrick Bedard, Car and Driver, 18 Nov. 2020 The customary equipment for the game was a hard rubber ball, and Castilla elastica rubber trees grow in the lowland coastal regions. Kiona N. Smith, Ars Technica, 25 Mar. 2020 The body of the speaker is made from aluminum covered with hard rubber, and most of it is covered in mesh. Jim Rossman, Dallas News, 16 Jan. 2020 See More
Kevin Purdy, Ars Technica, 8 Sep. 2022 Carbon disulfide, used in hard rubber, viscose rayon, and cellophane, harmed generations of workers yet remains in use, notes Paul Blanc, a professor of medicine at UC San Francisco who has written about this history. Rebecca Altman, The Atlantic, 15 Mar. 2022 The array tiny hard rubber lugs on the outsole of the forefoot helps keep the weight down and provide exceptional traction on both wet and dry surfaces. Brian Metzler, Outside Online, 28 Sep. 2020 The ball used in the game is a hard rubber one that bounces well and can be thrown from stick to stick and eventually shot into the goal. Chris Hachey, BGR, 25 Mar. 2021 Made of hard rubber or plastic, soft spikes provide traction on wet or soft turf without damaging the green. Angela Watson, chicagotribune.com, 28 Feb. 2021 The door and center armrests in front feel like hard rubber, the small LCD gauges in the dash are unreadable through polarized sunglasses, and the door pockets are tiny. Patrick Bedard, Car and Driver, 18 Nov. 2020 The customary equipment for the game was a hard rubber ball, and Castilla elastica rubber trees grow in the lowland coastal regions. Kiona N. Smith, Ars Technica, 25 Mar. 2020 The body of the speaker is made from aluminum covered with hard rubber, and most of it is covered in mesh. Jim Rossman, Dallas News, 16 Jan. 2020 See More Word History
First Known Use
1855, in the meaning defined above