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 (known as oedema in the UK) is a build up of fluid in the body (water retention) which causes swelling.Edema commonly affects the legs, ankles, feet and wrist. Water retention is often treatable, with treatment varying depending on the cause.dema (known as oedema in the UK) is a build up of fluid in the body (water retention) which causes swelling.