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Meaning of aecidium

ae•cid•i•um

Pronunciation: (ē-sid'ē-um), [key]
— pl. ae•cid•i•a
  1. an aecium in which the spores are always formed in chains and enclosed in a cup-shaped peridium.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.