alien apparent border circumference cortex cortical covering crust envelope epidermic epidermis exomorphic exotic exterior extraneous extraorganismal extrinsic facade face facet foreign fringe front impersonal integument lineaments nonsubjective objective open out outer outer face outer layer outer side outer skin outermost outline outlying outmost outside outstanding outward outward-facing over perceptible peripheral periphery public rind roundabout seeming shell skin superficial superficies superstratum surface top visible