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List of terms beginning with Ba


Bacteria are single cell micro organisms. Some bacteria cause diseases if they get into the body. 


A bacterium is a single bacteria.

Balanced diet

Having a balanced diet means eating a wide variety of foods to give you all the energy, protein, vitamins and minerals you need to stay healthy. For most of us, that means eating more fruit and vegetables (at least 5 portions a day), more fibre, less fat and cutting down on sugar, alcohol and salt.

Barium tests

Barium is a soft white metal. Doctors use barium sulphate to help them take X-rays of the digestive system. Before an X-ray you either have the barium as a white liquid drink (known as a barium meal or barium swallow) or you have it put into your back passage (a barium enema). X-rays cannot go through barium, so the outline of the stomach or bowel shows up on the X-ray picture.

Barrett's oesophagus

Abnormal cells in the lining of the food pipe (also called the gullet or oesophagus). The areas of abnormal cells are called dysplasia. Barrett's oesophagus slightly increases the risk of developing cancer of the oesophagus. It is most likely to be diagnosed in people who have a long history of burning indigestion.

Barrier contraception

Barrier methods of contraception are types of contraception that put a barrier between the penis and cervix to prevent pregnancy. They include condoms (sheaths) and caps (diaphragms).

Basal cell

Basal cells can be found in the deepest layer of the skin (epidermis). All new skin cells develop from basal cells.

Basal cell breast cancer

Basal cell breast cancer is a type of breast cancer. Basal cells don’t usually have receptors for oestrogen, progesterone or the her2 neu protein, so doctors may call it triple negative breast cancer. This type of breast cancer is unlikely to respond to hormone therapy or Herceptin. Women diagnosed may be younger than with other types of breast cancer – sometimes in their 30s. It is more common in African American women than in other ethnic groups.

Basal cell skin cancer

A cancer that develops in cells found in the deepest layer of the skin – basal cells.

Basement membrane

The foundation layer of tissue that cells sit on. If cancer cells from a tumour have broken through the basement membrane, the cancer may then spread and is called invasive.


Batimastat is a research drug that may stop blood vessels from supplying a growing cancer (an antiangiogenic drug).

Updated: 29 June 2016