noun.
A single-celled or many-celled structure in which spores are produced, especially in fungi, algae, mosses, and ferns.
The Century Dictionary and Cyclopedia
noun.
In botany, a spore-case; the case or sac in cryptogamous plants in which the spores, which are the analogues of the seeds of the higher or flowering plants, are produced endogenously.
noun.
Also sporange.
the GNU version of the Collaborative International Dictionary of English
noun.
A spore case in the cryptogamous plants, as in ferns, etc.
noun.
A case, capsule, or container in which spores are produced by an organism.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
organ containing or producing spores
Word Usage
"Later, the inner of these two layers becomes disorganized, so that the central mass of cells floats free in the cavity of the sporangium, which is now surrounded by but a single layer of cells (_E_)."