| 释义 |
purpurin Chem.|ˈpɜːpjʊərɪn|
Also (in commercial use) -ine.
[f. L. purpur-a purple + -in1.]
A red colouring matter, C14H5O2(OH)3, used in dyeing, orig. extracted from madder, hence called madder-purple; also prepared artificially by the oxidation of alizarin.
1839Ure Dict. Arts 785 Purpurine, the crude substance from which they profess to extract alizarine, is a richer dye than this pure substance itself. c1865J. Wylde in Circ. Sc. I. 421/2 Other principles may be extracted from madder, such as purpurine, alizarine, xanthine. 1868Watts Dict. Chem. IV. 749 Purpurin.
b. Path. (See quots.)
1858in Mayne Expos. Lex. 1890Billings Med. Dict., Purpurin, Prout's name for the red coloring matter found in the urine of some rheumatic patients. 1897Syd. Soc. Lex., Purpurin,..2. A red colouring-matter sometimes present in the urine, and supposed by some to be indicative of rheumatism or hepatic derangement. |