[kī′mir·ik ‚dē¦äk·se¦rī·bō¦nü¦klē·ik ′as·əd] (genetics) A recombinant deoxyribonucleic acid (DNA) molecule that contains sequences from more than one organism. (cell and molecular biology) A deoxyribonucleic acid (DNA) molecule that has resulted from recombination or from the splicing together of DNA from two sources.