| Term | Definition |
|---|---|
| Omentectomy |
The surgical removal of the fatty tissue covering within the abdomen. |
| Oncologist |
A physician who specializes in cancer treatment. |
| Oocytes (ova or egg cells) |
The female cells of reproduction. |
| Oophorectomy |
A surgical procedure in which one or both of the ovaries is removed. |
| Orchiectomy |
A surgical procedure to treat testicular cancer in which the doctor removes one or both testicles through an incision (cut) in the groin. |
| Orgasm |
Sexual climax. |
| Ovarian cancer |
An abnormal growth of tissue (tumor) that develops in a woman's ovaries. |
| Ovarian cyst |
A sac filled with fluid or a semisolid material that forms on or within one of the ovaries, the small organs in the pelvis that make female hormones and hold egg cells. |
| Ovary |
A small organ in the pelvis that makes female hormones and holds egg cells which, when fertilized, can develop into a baby. There are two ovaries: one located on the left side of the uterus (the hollow, pear-shaped organ where a baby grows) and one on the right. |