Synonym: callosity, callousness, harshness, inclemency, insensibility, rigor, rigorousness, rigour, rigourousness, ruggedness, severeness, severity, stiffness, unfeelingness. Similar words: awkwardness, madness, sadness, kindness, wretchedness, harness, hard-pressed, wednesday. Meaning: ['hɑrdnɪs /'hɑː-] 
n. 1. the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale 2. devoid of passion or feeling; hardheartedness 3. the quality of being difficult to do 4. excessive sternness.
n. 1. the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale 2. devoid of passion or feeling; hardheartedness 3. the quality of being difficult to do 4. excessive sternness. 
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181. The secret to a diamond's hardness is its atomic arrangement.
182. Microstructure and hardness of the joint were analyzed by optical metallurgical microscope, EDS and micro-hardness tester.
183. The measurement of density and hardness of carbide tips is one of effective method to judge the real compositions of carbide tip and index of performance quality.
184. Some characteristics of the rolls, such as strength vs. Thermal shock, tensile strength and contact fatigue strength, influence spalling. Thus[Sentencedict], strength was investigated as a hardness parameter.
185. Also, increasing the ratio of carrot pulps weakened extrudate's structurelowered the hardness and lifted the redness.
186. On the other hands, the hardness, chewiness, resilience and springiness of the surimi gels were weakened with the addition of the gelatin(P0.05).
187. Uses in each kind of medium degree of hardness solid material , in cement industry, limestone in broken bits , paste , chamotte, and so on mix material .
188. The results show that the microstructure at remelted surface layer consists of mainly cementite and ledeburite, which apparently improves the hardness and wear resistance of the remelted specimen.
189. It is made suggestions for the criterion of hardness and precision of the thrust bearing runner.
190. The composition, microstructure, and hardness of the ceramal layer were analysed with the help of EPMA, XRD and a microhardness measuring instrument.
191. The hardness of leaves with leather texture (such as fresh bamboo and lilac) is higher, while that with wax texture (such as lotus and canna) is lower.
192. The distribution of microhardness in the cross section presents a trend of high-low-high-low-high, the lowest hardness is in the advancing side of the HAZ.
193. For the materials with high hardness, such as cemented carbide, glass , jadeware, etc.
194. Function: Chrome steel for rapid cooling and the whole level, achieve the desired hardness.
195. Properties determined by mechanical testing, such as yield strength, ductility, ultimate tensile strength, hardness, bendability, impact strength, etc.
196. The surface layers are characterized by means of optical microscope, TEM, SEM and micro - hardness testing machine.
197. The plasma nitriding will improve on surface hardness and wear resistance of the piston ring.
198. When the austempering time is given, the effect order of them on the hardness and the impact toughness is heating-up temperature, holding time and iso-quenching temperature.
199. The tensile strength, modulus of elasticity(MOE) and hardness of Pinus massoniana fibers were determined by using zero-span tension and nanoindentation technique.
200. QC equipment CNC Coordinate Measuring Instrument Microscope projector roughness detector height e hardness machine salt spray test machine material testing machine and related laboratory equipment.
201. It is resistant to TMV and tolerant to CMV. The variety has high fruit hardness and fruit cracking resistance.
202. The main factors that influence tablet hardness and disintegration time are wetting agent ethanol, agglutinating agent polyvinylpyrrolidone(PVP) and tablet pressure.
203. Good hardness and wear resistance, moderate impact resistance in the series.
204. Some of Boron Carbide's unique properties include: high hardness, chemical inertness, and a high neutron absorbing , cross section.
205. Labradorite is dark blue, soft black, full of gleaming lights, like the aurora borealis embedded in hardness.
206. Hardness, strength, fatigue resistance, wear resista nce, corrosion resistance, oxidation resistance, conductivity and optical property of material surface can be improved by ion implanting.
207. The results showed that to the high hardness SEBS compound, the influence of the variety and quantity of the filler on the tension set was more distinct than that on other properties.
208. Fractured translation cam of motor planet reducer was studied by chemical analysis, hardness test and metallographic examination.
209. The hardness gradient, depth , microstructure and phases of nitrided layers were measured with Microhardness Apparatus, Microcopy and X-ray diffractometer .
210. Use soft water, hardness and chemical impurities, sharp decline in electrical conductivity.
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