サムラワールド辞書
(1)
名詞
Pollen, a mass of microspores in a seed plant appearing usually as a fine dust. Each pollen grain is a minute body, of varying shape and structure, formed in the male structures of seed-bearing plants and transported by various means (wind, water, insects, etc.) to the female structures, where fertilization occurs. (Britannica)
例
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There is so much pollen in the air. My allergies are killing me!