blueline

1. (surgery) To mark on a patient's body where the surgical incision is to be made.Examples: "Bone removal was continued in order to "blueline" the vestibule and then extended superiorly over the vestibule until Bill's bar was exposed."; "After bluelining, the bony endostium is opened with a 90°-degree microhook; care must be taken to avoid suction of the perilymph; the membranous canal comes into view"; "The lateral canal is first bluelined, then opened with a cutting burr."

2. (US, Canada) To designate a certain area as representing one in which investment is risky.Examples: "Not unlike the negative results of the bluelining and steering practices of many banks and real estate firms, such efforts leave bitterness in their wake and serve to bolster the worst fears and prejudices of both races."CanadaUS