hard

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hard

1. Chem (of water) impairing the formation of a lather by soap
2. (of alcoholic drink) being a spirit rather than a wine, beer, etc.
3. (of a drug such as heroin, morphine, or cocaine) highly addictive
4. Physics (of radiation, such as gamma rays and X-rays) having high energy and the ability to penetrate solids
5. Physics (of a vacuum) almost complete
6. Chiefly US (of goods) durable
7. politically extreme
8. Brit a roadway across a foreshore

hard

[härd]
(materials)
Quality of a material that is compact, solid, and difficult to deform.
References in periodicals archive ?
The hardnesses of the wood specimens for the radial and tangential sections, of which MCs deviated from 12 percent were converted for 12 percent MC by the following equation:
B-J12[perpendicular to]] = values of Janka and Brinell hardnesses of the wood specimens for radial and tangential sections at 12 percent MC, respectively (N, Number).
Hardnesses and fatigue are influenced by water level, polymer content and index, to different degrees.
The experimental polyols led to hardnesses similar to those obtained with HS-100 polyol, for a given TDI index and porosity.
Hercuprene S-2954 is available in hardnesses of 50, 60, and 75 A and is bondable to ABS, PC, PC/ABS, cellulose acetate propionate, and polyesters.
Applications have involved TPU gaskets and seals with Shore A hardnesses of 70 and above.
The initial Uniprene offering includes five grades with hardnesses of 55-87 Shore A and 40-50 Shore D.
Unlike PVC, POEs offer improved low-temperature flexibility at a broad range of Shore A hardnesses.