u·ra·cil 
(yrə-sĭl)
(yrə-sĭl)n. Abbr. U
A pyrimidine base, C4H4N2O2, that is an essential constituent of RNA.
[UR(EA) + AC(ETIC) + -il, substance relating to.]
- supersensibly
- supersession
- supersize
- supersonic
- supersonically
- supersonics
- supersonic transport
- superspecies
- superstar
- superstardom
- superstation
- superstition
- superstitious
- superstitiously
- superstitiousness
- superstore
- superstratal
- superstrate
- superstratum
- superstring
- colonoscope
- colonoscopy
- colony
- colony collapse disorder
- colony-stimulating factor