Word Origin and History for tertiary Expand. adj. 1650s, of the third order, rank, degree, etc., from Latin tertiarius of or pertaining to a third, from tertius third, a third, from root of tres three (see three).
Water and Fluid retention in legs, also known as edema, is a medical condition caused by abnormal accumulation of water or fluids in the bodyâs tissues. Though excess water can be accumulated anywhere in the body, the most common areas are the ankles and legs.
Water retention can occur due to any of the following reasons: 1  An unbalanced diet and lack of exercise. 2  Reaction to some drugs can cause fluid retention too. 3  Dehydration: as the body tries to keep the extra water. 4  Menopause is often associated with water retention in women. 5  Diseases like Thyroid, Arthritis and Varicose Veins.