Definitions for uracilˈyʊər ə sɪl
Random House Webster's College Dictionary
u•ra•cilˈyʊər ə sɪl(n.)
a pyrimidine base, C4H4N2O2, that is one of the fundamental components of RNA, in which it forms base pairs with adenine.
Ref: Symbol: U 5
Origin of uracil:
1905–10; ur -1+ac (etic ) +-il, of uncert. orig.
a base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine
One of the bases of RNA. It pairs with adenine and is symbolised by U.
Origin: From ur- + acetic + -ile