edema or oedema

Term: edema (Americak English) or oedema (British English)

Origin:  Anc Greek οίδημα/edema(swelling)

> οιδάνω/edano(=swell)

>οίδα/eda(=see as edema is seen due to its size)  

The same root has the name of the mythical Greek king  in word Oedipus (Οἰδίπους Oidípous)  meaning "swollen-footed")

Definition:

Edema is an abnormal accumulation of fluid beneath the skin in the small cavities that surround the body tissues and organs.