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.
Most commonly, fluid retention is marked by swelling of your feet and lower legs, but swelling could also occur in your arms, hands, face, or other areas of the body. Fluid retention can be caused by a wide range of conditions and diseases. The most common cause of fluid retention is too much salt in your diet.