from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A union of pollen microspores.
from The Century Dictionary and Cyclopedia
- In botany: In the Filicineœ, a mass of hardened frothy mucilage inclosing a group of microspores.
- In phanerogams, a group of cohering pollen-grains that have been produced by one primary mother-cell.
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