单词 | undercool |
释义 | undercoolv. 1. [compare under- prefix1 4a(c)] a. transitive. = supercool v. 1. ΘΚΠ the world > matter > properties of materials > temperature > coldness > make cold [verb (transitive)] > subject to supercooling superfuse1657 supercool1867 undercool1895 the world > matter > physics > electromagnetic radiation > heat > low temperature physics > subject to supercooling [verb (transitive)] superfuse1657 surfuse1863 supercool1867 superfuse1880 undercool1895 1895 C. S. Palmer tr. W. Nernst Theoret. Chem. i. iii. 65 Probably the two curves would intersect asymptotically at abs. zero, if one could under-cool a liquid so far. 1962 Zeitschr. f. Metallkunde 53 600/2 Many molten metals slagged in Pyrex glass can be highly undercooled irrespective of the amount. 1977 Scripta Metall. XI. 253 Ingots..were under-cooled and solidified under increasing gravity-levels. b. intransitive. = supercool v. 2. ΘΚΠ the world > matter > physics > electromagnetic radiation > heat > low temperature physics > undergo supercooling [verb (intransitive)] supercool1899 undercool1969 the world > matter > properties of materials > temperature > coldness > be cold [verb (intransitive)] > become cold > undergo supercooling supercool1899 undercool1969 1969 Cast Metals Research Jrnl. 5 137/1 Cooling curves for ductile iron showed no distinct eutectic arrest but undercooled during eutectic solidification. 1977 Scripta Metall. XI. 253 The prepared boules were heated to 230°C, and allowed to undercool. 2. [compare under- prefix1 5(a)] transitive. To cool insufficiently. ΘΚΠ the world > matter > properties of materials > temperature > coldness > make cold [verb (transitive)] > cool > insufficiently undercool1983 1983 New Scientist 13 Jan. 83/2 The continued loss of core-cooling water..meant that the reactor's core was seriously undercooled. Derivatives underˈcooled adj. [after German unterkühlt (1875 or earlier)] ΘΚΠ the world > matter > properties of materials > temperature > coldness > [adjective] > made cold or cool > insufficiently undercooled1895 the world > matter > physics > electromagnetic radiation > heat > low temperature physics > [adjective] > cooled surfused1878 supercooled1881 undercooled1895 1895 C. S. Palmer tr. W. Nernst Theoret. Chem. i. iii. 65 The dotted line is the pressure curve of the under-cooled liquid substance, and forms the continuation of the pressure curve of the liquid. 1913 Engineering 10 Oct. 510/3 The under-cooled liquid phase can in many cases be retained in the metastable condition at temperatures far below the normal freezing-point by a process of under~cooling. 1980 Sci. Amer. Apr. 84/3 Above the glass temperature, in the undercooled liquid phase, the atoms are free to make extensive translational movements. underˈcooling n. [after German Unterkühlung (1875 or earlier)] ΘΚΠ the world > matter > properties of materials > temperature > coldness > [noun] > becoming or making cold > insufficiently undercooling1936 the world > matter > physics > electromagnetic radiation > heat > low temperature physics > [noun] > cooling without solidification superfusion1657 superfusion1846 supercooling1891 undercooling1936 1936 Forestry 10 128 The point at which ice formation begins may be still further lowered by under~cooling. If water is kept absolutely still, it is possible to lower its temperature below the freezing point without ice formation... This undercooling often takes place in plants. This entry has not yet been fully updated (first published 1986; most recently modified version published online December 2021). < |
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