dilation and curettage: a surgical procedure usually performed under local anesthesia in which the cervix is dilated and the endometrial lining of the uterus is scraped with a curet; performed to obtain tissue samples or to stop prolonged bleeding or to remove small tumors or to remove fragments of placenta after childbirth or as a method of abortion
operation: a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body
formula: a group of symbols that make a mathematical statement