| 单词 | philosophers' wool |
| 释义 | > as lemmasphilosophers' wool philosophers' wool n. zinc oxide in the form of a white flocculent powder, esp. as resulting from the burning of zinc. ΘΚΠ society > occupation and work > materials > derived or manufactured material > materials produced from metalworking > [noun] > oxide of zinc philosophic cotton1753 philosophic wool1758 philosophical wool1771 philosophers' woolc1865 philosophic(al) woolc1865 furnace cadmia1881 the world > matter > constitution of matter > granular texture > [noun] > state of being powdery > formed by calcination > specific philosophers' woolc1865 philosophic(al) woolc1865 c1865 J. Wylde Circle of Sci. I. 191/2 A flocky-white powder, which has been called ‘philosophers' wool’. 1938 R. Hum Chem. for Engin. Students xxii. 580 When heated strongly, the metal burns with a greenish flame liberating clouds of oxide in the form known as ‘Philosopher's wool’. 1958 Philos. Sci. 25 186/2 The picturesque philosopher's wool became the prosaic but much more useful zinc oxide. philosophers' wool philosophic(al) wool, philosophers' wool, (Latin lana philosophica), oxide of zinc, deposited as a fine flocculent powder, during the combustion of the metal.extracted from wooln.< as lemmas |
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