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.
Some common signs will help you determine if you are retaining water. 1  Look for signs of swollen ankles, feet and legs, especially at the end of a long day spent standing or sitting. 2  Observe if skin appears stretched and shiny as it covers the swollen area that is larger than normal due to water retention.