Wiktionary
unidirectionally
adv. In a single direction; in a unidirectional fashion
Usage examples of "unidirectionally".
This picture implied some parallel branching structure of universes in which every point along a timeline became a branch-point into a possibly infinite number of other timelines, with the branches forking unidirectionally like those of a tree.
But taken as a group, all the tiny pieces pointed unidirectionally to the same conclusion.