angioedema vs. edema

angioedema

noun

Pathology.
  1. swelling that occurs just beneath the surface of the skin or mucous membranes.

edema

noun

Pathology.
plural edemas, edemata
  1. effusion of serous fluid into the interstices of cells in tissue spaces or into body cavities.
  2. Plant Pathology.
    1. a small surface swelling of plant parts, caused by excessive moisture.
    2. any disease so characterized.