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.
Kidney Failure. The kidneys regulate the amount of sodium and fluid in the body. When they work properly, the kidneys respond to excess fluid by eliminating it in the urine. In cases of acute or chronic kidney failure, the kidneys do not maintain normal fluid levels. This results in water retention by the feet, legs, eyelids, ankles and hands.