What is "microsporangium"

Microsporangium \Mi`cro*spo*ran"gi*um\, n. [NL. See Micro-, and Sporangium.] (Bot.) A sporangium or conceptacle containing only very minute spores. Cf. Macrosporangium.

n. (context botany English) A case, capsule or container that holds microspores.

1. n. a plant structure that produces microspores

2. [also: microsporangia (pl)]