from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A pyrimidine base, C4H4N2O2, that is an essential constituent of RNA.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. One of the bases of RNA. It pairs with adenine and is symbolised by U.
from The Century Dictionary and Cyclopedia
- n. A colorless compound, prepared by the action of hydrochloric acid on methylmercapto-uracil. It crystallizes in spherical masses of minute needles and melts at 338° C.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine
ur(ea) + ac(etic) + -il, substance relating to.(American Heritage® Dictionary of the English Language, Fourth Edition)
From ur- + (ac)etic + -ile (Wiktionary)