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.
Overview. 1  Mild, temporary water retention in the hands or feet often occurs in hot weather or after overindulging in salty foods. While this type of water retention is usually harmless, fluid accumulation in the abdomen signals a health problem that requires medical evaluation. Water retention in the abdomen -- known medically as ascites -- most commonly occurs due to liver disease.