intervisible

adjective

in·​ter·​vis·​i·​ble ˌin-tər-ˈvi-zə-bəl 

: visible to or from one another : mutually visible

two intervisible street crossings

intervisibility

ˌin-tər-ˌvi-zə-ˈbi-lə-tē 

noun

plural intervisibilities

the intervisibility of two points

… various graphical methods … have been devised for determining intervisibilities from maps.

—Edgar Woolard

Word History

First Known Use

1848, in the meaning defined above