barbituric acid

noun
a white, crystalline, slightly water-soluble powder, C 4 H 4 N 2 O 3 , used chiefly in the synthesis of barbiturates.
Also called malonylurea.


Origin:
1865–70

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Collins
World English Dictionary
barbituric acid (ˌbɑːbɪˈtjʊərɪk)
 
n
Systematic name: 2,4,6-trioxypyrimidine, Also called: malonylurea a white crystalline solid used in the preparation of barbiturate drugs. Formula: C4H4N2O3
 
[C19: partial translation of German Barbitursäure, perhaps from the name Barbara + uric + Säure acid]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

barbituric acid bar·bi·tu·ric acid (bär'bĭ-tur'ĭk, -tyur'-)
n.
An organic acid used in the manufacture of barbiturates.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Britannica
Encyclopedia

barbituric acid

an organic compound of the pyrimidine family, a class of compounds with a characteristic six-membered ring structure composed of four carbon atoms and two nitrogen atoms, that is regarded as the parent compound of the barbiturate drugs. It is used in the production of riboflavin, a nutritional factor (see vitamin B2).

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
After the reaction is complete, color is formed on the addition of pyridine-barbituric acid reagent.
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