sporangium(n = noun.plant) spore case, spore sac - organ containing or producing spores;
is a kind of reproductive structure
has particulars: macrosporangium, megasporangium, microsporangium, eusporangium, leptosporangium, tetrasporangium
A spore case in the cryptogamous plants, as in ferns, etc. [1913 Webster]
sporangium, n. (pl. sporangia) Bot. a receptacle in which spores are found.
Derivative:
sporangial adj.
Etymology:
mod.L f. Gk spora SPORE + aggeion vessel