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.
Congestive heart failure leads to sodium retention, which causes an accumulation of fluid in the body. In kidney disease, salt and water retention may lead to swelling in the lower legs, the face and eventually the entire body. If you have swollen legs and/or feet for more than two days, see your doctor.