| 单词 | animal charcoal |
| 释义 | > as lemmasanimal charcoal animal charcoal n. now chiefly historical carbonaceous material formed by charring animal matter (esp. bone), and used as a black pigment and as a decolourizing agent. ΘΚΠ the world > matter > colour > named colours > white or whiteness > whitener > [noun] > bleaching agent blancher1477 whitener1686 white steep1804 eau de Javelle1807 chlorine1810 animal charcoal1838 chemic1843 styrone1852 bleaching powder1854 oxygen1858 decolorizerc1865 still-liquor1866 bleach1898 1779 E. Darwin Let. 10 Dec. (2007) 172 Animal charcoal, as burnt blood, or a baked raven. 1786 Edinb. New Dispensatory Introd. p. xxviii Charred vegetables, as charred linen or tinder; charred pit-coal, as coaks or cinders; animal charcoal, as charred ox-blood. 1838 T. Thomson Chem. Org. Bodies 755 Animal charcoal is a much more powerful discolouring principle than vegetable charcoal. 1938 R. Hum Chem. for Engin. Students iv. 71 Animal Charcoal or Bone Black is obtained by the destructive distillation of slaughter house refuse such as bones and blood. 1941 A. C. Davies Sci. & Pract. Welding ii. 94 Parts to be case-hardened are..covered with carbonaceous powder, such as charred leather, powdered bone, animal charcoal, or cyanide of potassium. 1987 Philos. Trans. (Royal Soc.) B. 317 84 Pioneering work on treating insoluble sources of phosphorus, such as animal charcoal (a waste product) with sulphuric acid to render them more available as manures. < as lemmas |
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