Tulip is a prostatic hyperplasia with a laser used as a cutting instrument. The laser is inserted into the penile urethra and directed at the diseased portion of the gland.A second incision made during surgery to promote drainage, relieve the tension on a wound as it is sutured, or facilitate mobilization of a sliding tissue flap.A cut made with a knife, electrosurgical unit, or laser, esp. for surgical purposes.