Because A, G, C, and T appear in the DNA, these molecules are called DNA-bases; A, G, C, and U are called RNA-bases. Uracil and thymine are identical except that uracil lacks the 5' methyl group. Adenine and guanine belong to the double-ringed class of molecules called purines (abbreviated as R).
Definition of decalcomania. 1  1 : the art or process of transferring pictures and designs from specially prepared paper (as to glass) 2  2 : decal.
Chambers 20th Century Dictionary(0.00 / 0 votes)Rate this definition: Decretal. de-krÄâ²tal, adj. pertaining to a decree.ân. a decree, esp. of the pope: a book containing decrees: spec. in pl. the second part of the canon law, the decrees of various popes determining points of ecclesiastical law.ân.