horizontally

adv

1. In a horizontal direction or position.

   “Japanese can be written horizontally as well as vertically.”

   “Moreover, recent research showed that the amount of genetic material that can be moved horizontally may include small gene fragments, entire operons, superoperons that encode complex biochemical pathways, and whole chromosomes [ 54 ].”

2. In a horizontal manner (any sense).

   “an organism transmitted horizontally”