| 单词 | hemi-hydrate | 
| 释义 | > as lemmashemi-hydrate   hemi-hydrate  n.  Brit. , U.S. , ΘΚΠ society > occupation and work > materials > derived or manufactured material > plaster > 			[noun]		 > plaster of Paris plastera1387 plaster of Parisa1425 yesoa1533 gesso1596 gypsum1646 Paris plaster1855 stucco1897 hemi-hydrate1909 1909    Webster's New Internat. Dict. Eng. Lang.  				Hemihydrate. 1946    Nature 6 July 13/2  				Calcium sulphate exists in three states of hydration, anhydrite, gypsum, and the lower hydrate, generally known as hemihydrate or plaster of Paris. 1965    New Scientist 18 Mar. 709/2  				Gypsum is calcined to form the hemi-hydrate which sets after wetting to re-form gypsum. < as lemmas | 
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