intercolumniation

noun

in·​ter·​co·​lum·​ni·​a·​tion ˌin-tər-kə-ˌləm-nē-ˈā-shən 

1

: the clear space between the columns of a series

2

: the system of spacing of the columns of a colonnade

Word History

Etymology

Latin intercolumnium space between two columns, from inter- + columna column

First Known Use

1624, in the meaning defined at sense 1