Definitions

1. noun

A small spore, typically one-fourth the size of a megaspore, produced by the microsporophylls of gymnosperms and by the antheridiophores of some ferns.

“The study of microspores in gymnosperms helped us understand their evolutionary history.”

2. noun

A spore resulting from the meiosis of a microsporocyte in the anther of flowering plants.

“Microspores are produced in large quantities in the anthers of flowering plants.”