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| a compound capable of changing state or becoming inactive when subjected to heat or radiation |
| like or containing an alkali, which neutralize acids to form salts and turn red litmus paper blue, or having a pH value greater than 7 |
| noble (ˈnəʊbəl) | |
| —adj | |
| 1. | of or relating to a hereditary class with special social or political status, often derived from a feudal period |
| 2. | of or characterized by high moral qualities; magnanimous: a noble deed |
| 3. | having dignity or eminence; illustrious |
| 4. | grand or imposing; magnificent: a noble avenue of trees |
| 5. | of superior quality or kind; excellent: a noble strain of horses |
| 6. | chem |
| a. (of certain elements) chemically unreactive | |
| b. (of certain metals, esp copper, silver, and gold) resisting oxidation | |
| 7. | falconry |
| a. Compare ignoble designating long-winged falcons that capture their quarry by stooping on it from above | |
| b. designating the type of quarry appropriate to a particular species of falcon | |
| —n | |
| 8. | a person belonging to a privileged social or political class whose status is usually indicated by a title conferred by sovereign authority or descent |
| 9. | (in the British Isles) a person holding the title of duke, marquess, earl, viscount, or baron, or a feminine equivalent |
| 10. | a former Brit gold coin having the value of one third of a pound |
| [C13: via Old French from Latin nōbilis, originally, capable of being known, hence well-known, noble, from noscere to know] | |
| 'nobleness | |
| —n | |
| 'nobly | |
| —adv | |