To inoculate or vaccinate in two places on the body, or to apply something using both eyes or a dual technique.
From 'bi-' (two) plus 'inoculate' (from Latin 'in-' in and 'oculus' eye); medical term from the 18th century for vaccination methods using two injection points.
Binoculate is a medical term that's almost completely vanished—it referred to old vaccination techniques where doctors would deliberately infect two body sites to boost immunity, a practice we'd never do now.
Complete word intelligence in one call. Free tier — 50 lookups/day.