| 单词 |
retentiveness |
| 释义 |
reˈtentiveness
[f. retentive a.1 + -ness.]
a. The state or quality of being retentive; the fact of possessing retention.
a1676Hale Prim. Orig. Man. iii. vi. (1677) 282 The great retentiveness of his Memory. 1685Gracian's Courtier's Orac. 261 When one finds himself moved, retentiveness should beat the retreat, lest the choler may be more heated. 1768Tucker Lt. Nat. II. 301 The acuteness of our senses,..the retentiveness of our memory. 1855Bain Senses & Int. i. i. §3 A third fact or property of the intellect is retentiveness. 1879Cassell's Techn. Educ. II. 172 The clay⁓land farmer endeavours to counteract the heaviness and retentiveness of his land.
b. Physics. The capability of retaining a residual magnetic field when a magnetizing field has been removed.
1886J. Hopkinson in Phil. Trans. R. Soc. CLXXVI. 460 The ordinate OB is what is generally meant by the residual induction after great magnetising force, or the ‘retentiveness’. 1902Encycl. Brit. XXX. 430/2 The ratio of the residual magnetization to its previous maximum value measures the retentiveness of the metal. [Note] Hopkinson specified the retentiveness by the numerical value of the ‘residual induction’ (= 4πI). 1924C. R. Underhill Magnets i. 21 The property whereby a magnetic material independently remains a magnet is called retentiveness. 1939[see retentivity]. |
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