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.
Edema, or water retention, causes swelling in the affected part of the body. Edema refers to swelling and puffiness in different areas of the body. It most often occurs in the skin, especially on the hands, arms, ankles, legs, and feet.