Dictionary.com

thiouracil

[ thahy-oh-yoor-uh-sil ]
/ ˌθaɪ oʊˈyʊər ə sɪl /
Save This Word!
noun Pharmacology.
a white, slightly water-soluble, bitter, crystalline powder C4H4N2OS, used chiefly in treating hyperthyroidism by reducing the activity of the thyroid gland.
QUIZ
CAN YOU ANSWER THESE COMMON GRAMMAR DEBATES?
There are grammar debates that never die; and the ones highlighted in the questions in this quiz are sure to rile everyone up once again. Do you know how to answer the questions that cause some of the greatest grammar debates?
Question 1 of 7
Which sentence is correct?
His boss, whom he admires, is waiting to meet with him about the big project.
His boss, who he admires, is waiting to meet with him about the big project.
TAKE THE QUIZ TO FIND OUT

Origin of thiouracil

First recorded in 1940–45; thio- + uracil

Words nearby thiouracil

thiosulfuric, thiosulfuric acid, thiosulphate, thiosulphuric acid, thiothixene, thiouracil, thiourea, thioxanthene, thir, thiram, third
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

British Dictionary definitions for thiouracil

thiouracil
/ (ˌθaɪəʊˈjʊərəsɪl) /
noun
a white crystalline water-insoluble substance with an intensely bitter taste, used in medicine to treat hyperthyroidism; 2-thio-4-oxypyrimidine. Formula: C 4 H 4 N 2 OS

Word Origin for thiouracil

from thio- + uracil (uro- 1 + ac (etic) + -il -ile)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
FEEDBACK