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.
Diffuse disc desiccation is the formal name for this common degenerative process in the spine. It can be a natural occurrence of the body as it ages, requiring intervention only when pain or mobility issues are also present. As we age, the discs in our spine dry out and flatten, losing their flexibility and plumpness. Diffuse disc desiccation is the formal name for this common degenerative process in the spine.