Medical Dictionary
Main Entry:
an·a·logue Variant:
or an·a·log /'an-&l-"og, -"äg/ Function:
noun 1 : something that is analogous or similar to something else
2 : an organ similar in function to an organ of another animal or plant but different in structure and origin
3 usually analog : a chemical compound that is structurally similar to another but differs slightly in composition (as in the replacement of one atom by an atom of a different elementor in the presence of a particular functional group)