bromouracil

[ broh-moh-yoo r-uh-sil ]
/ ˌbroʊ moʊˈyʊər ə sɪl /

noun Biochemistry.

a uracil derivative, C4H3N2O2Br, that pairs with adenine and sometimes with guanine during phage and bacterial DNA synthesis.

Origin of bromouracil

First recorded in 1955–60; bromo- + uracil