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.
Knowledge center. Water retention, also known as fluid retention refers to an excessive build up of fluid in the circulatory system, body tissues, or cavities in the body. Up to 70% of the human body consists of water-water exists both inside and outside our body's cells. Blood is mostly made up of water, as are our organs and muscles.