Edema and Oedema

Edema noun - Swelling from excessive accumulation of watery fluid in cells, tissues, or serous cavities.

Oedema is a synonym for edema. (British) In some cases you can use "Oedema" instead a noun "Edema".

Oedema noun - Swelling from excessive accumulation of watery fluid in cells, tissues, or serous cavities.

Edema is a synonym for oedema. (American) You can use "Edema" instead a noun "Oedema".