Lying around; surrounding; positioned or located all around something else.
From Latin 'circumjacens' (lying around, present participle of 'circumjacere'). This adjective emerged in medieval Latin scholarly writing and entered English around the 16th century for describing geographic and spatial relationships.
You'll encounter this word in old maps and travel literature—when describing areas 'circumjacent to Rome' or 'the circumjacent regions,' it meant the ring of territories surrounding the central location! Modern writers would say 'surrounding' or 'peripheral,' but the Latin term had intellectual prestige.
Complete word intelligence in one call. Free tier — 50 lookups/day.