(genetics) A structural analog of natural nucleic acid used to modify gene expression, in which the ribose or deoxyribose rings of nucleic acids are replaced with morpholine rings and the phosphodiester intersubunit linkages of nucleic acids are replaced with phosphorodiamidate linkages.

plural of morpholino

(organic chemistry) A heterocyclic ketone derived from morpholine; any derivative of this compound

plural of morpholinone