Video shows what pollen means. Fine powder in general, fine flour (16th century usage documented by OED; no longer common.). A fine granular substance produced in flowers. Technically a collective term for pollen grains (microspores) produced in the anthers of flowering plants. (This specific usage dating from mid 18th century.). pollen pronunciation. How to pronounce, definition by Wiktionary dictionary. pollen meaning. Powered by MaryTTS