What is Adjunctio?

Legal Definition
In the civil law. Adjunction; a species of accessio, whereby two things belonging to different proprietors are brought into firm connection with each other; such as interweaving, (intertextura;) welding together, (adferruminatio;) soldering together, (applumbaturaj) painting, (pictura;) writing, (scriptura;) building, (maedificatio;) sowing, (satio;) and planting, (plantatio.) Inst. 2, 1, 26-34; Dig. 6, 1, 23; Mackeld. Rom. Law, ยง 276. See Accessio.
-- Black's Law Dictionary