imprint, impression, depression - a concavity in a surface produced by pressing; "he left the impression of his fingers in the soft mud"

scotch, score - a slight surface cut (especially a notch that is made to keep a tally)

cut, cutting - the act of penetrating or opening open with a sharp edge; "his cut in the lining revealed the hidden jewels"

surgical operation, surgical procedure, surgical process, surgery, operation - a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body; "they will schedule the operation as soon as an operating room is available"; "he died while undergoing surgery"

gastromy - surgical incision into the stomach

keratotomy - surgical incision into the cornea

perineotomy - surgical incision into the perineum

laparotomy - surgical incision into the abdominal wall; often done to examine abdominal organs

orchotomy - surgical incision into the testis to obtain material for analysis (as in cases of abnormally low sperm count)

sclerotomy - surgical incision of the sclerotic coat of the eye

nephrotomy - incision into a kidney (usually to remove a kidney stone)

valvotomy, valvulotomy - incision into a stenosed cardiac valve to relieve the obstruction

phlebotomy, venesection - surgical incision into a vein; used to treat hemochromatosis

vasosection, vasotomy - surgical incision into or division of the vas deferens