Dilate means "to become wider."
For example:
His pupils dilated when he saw her.
The cervix dilates prior to giving birth so that the fetus can transit the vagina.
Hemorrhoids are dilated or varicose veins of the rectum or anus. They can be painful or painless.
telangiectasia
Closed has the same meaning in medical terms as in lay language. A closed fracture means there is no related opening in the skin. A closed cervix does not have a dilated os.
Varicose means pertaining to a dilated vein. The vein itself might be called a varicosity or a varicose vein.
It essentially is a duct that has been dilated by iodine.
The answer to that is varicose veins.
To pronounce a medical term is to say that term out loud.
Medical term Soma mean the cell body.
Miotic in medical term means with constricted pupils.
If by "safe" you mean a condom, the medical term is prophylactic.
This is not a medical term. It is the chemical symbol for the element sodium.Otherwise it may be a common term (not medical) for "not applicable" n/a.
Dilated means made wider of larger, so 50% dilated is 50% larger