Means in front of, usually with reference to the front part of the body. Often used in association with the term 'anterior presentation' . Usually, babies are born with the back of the head pointed up or slightly to the left or right side. It is as if the child was looking at the floor during emergence from the birth canal. This is the best position in most cases since it allows the child to negotiate more easily the turns required to get through the mother's pelvis and birth canal.
A term in anatomy to indicate location in the front. In ophthalmology anterior indicates the portions of the eye most external towards the front of the face. The front cornea surface to the back of the lens is the portion of the eye known as the anterior segment.
mediastinotomy (MEE-dee-a-stin-AH-toe-mee) A procedure in which a tube is inserted into the chest to view the tissues and organs in the area between the lungs and between the breastbone and heart. The tube is inserted through an incision next to the breastbone. This procedure is usually used to get a tissue sample from the lymph nodes on the left side of the chest. Also called the Chamberlain procedure.