e·de·ma also oe·de·ma ( -d  m )n. pl. e·de·mas also oe·de·mas or e·de·ma·ta also oe·de·ma·ta (-m -t) 1. Pathology An excessive accumulation of serous fluid in tissue spaces or a body cavity. 2. Botany Extended swelling in plant organs caused primarily by an excessive accumulation of water. [Middle English ydema, from Greek oid ma, a swelling, from oidein, to swell.]e·dem a·tous (-d m-ts) adj. |
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