black heat
noun
A degree of heat or a temperature that is not sufficiently warm enough to produce visible light.
Origin
Early 19th century; earliest use found in William Herschel (1738–1822), musician and astronomer.
| 单词 | black heat |
| 释义 | black heatnoun A degree of heat or a temperature that is not sufficiently warm enough to produce visible light. Origin |
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