corresponding or similar in position or structure or function or characteristics; especially derived from an organism of the same species; "a homologous tissue graft"
having the same evolutionary origin but serving different functions; "the wing of a bat and the arm of a man are homologous"
highly significant or important especially bringing about or marking the beginning of a new development or era; "epochal decisions made by Roosevelt and Churchill"; "an epoch-making discovery"
diffusion of molecules through a semipermeable membrane from a place of higher concentration to a place of lower concentration until the concentration on both sides is equal
moving from one place to another and back again; "he traveled back and forth between Los Angeles and New York"; "the treetops whipped to and fro in a frightening manner"; "the old man just sat on the porch and rocked back and forth all day"