1.1.1 Synonyms; 1.1.2 Translations; English Noun . See synonyms for pollen grain. Pollen is a powdery substance consisting of pollen grains which are male microgametophytes of seed plants, which produce male gametes (sperm cells). pollen grain - WordReference English dictionary, questions, discussion and forums. What does pollen grain mean? It is crucial in a plant's fertilization process. These undergo meiosis, and produce pollen grains, which produce the male gametes . Contents. The pollen is released by the opening of the anther. Pollen definition is - a mass of microspores in a seed plant appearing usually as a fine dust. Definition from Wiktionary, the free dictionary. All Free. Jump to navigation Jump to search. Each microsporangium contains pollen mother cells. The pollen is carried by some agent (wind, or some animal) to the receptive … pollen grain translation in English-Tagalog dictionary. pollen grain (plural pollen grains) A single male reproductive particle of which the pollen of a plant consists. Pollen, 2 meanings, Noun: Fine powder in general, fine flour (16th century usage documented by the OED; no longer common.) Pollen grains have a hard coat made of sporopollenin that protects the gametophytes during the process of their movement from the stamens to the pistil of flowering plants, or from the male cone to the female cone of coniferous plants. microgametophyte; Translations . pollen definition: 1. a powder, produced by the male part of a flower, that causes the female part of the same type of…. Showing page 1. Meaning of pollen grain in English: pollen grain. 1 English. Pollen definition, the fertilizing element of flowering plants, consisting of fine, powdery, yellowish grains or spores, sometimes in masses. n. A microspore of a seed plant, containing a partially developed male gametophyte. See more. Synonyms . Define pollen grain. A pollen grain is a microscopic body that contains the male reproductive cell of a plant. Found 18 sentences matching phrase "pollen grain".Found in 2 ms. Learn more. pollen grain synonyms, pollen grain pronunciation, pollen grain translation, English dictionary definition of pollen grain. Each of the microscopic particles, typically single cells, of which pollen is composed. Definition of pollen grain in the Definitions.net dictionary. Meaning of pollen grain. Information and translations of pollen grain in the most comprehensive dictionary definitions resource on the web. noun. Pollen grains have a tough coat that has a form characteristic of the pollen-producing plant and which can still be recognized in some archaeological deposits. 1.1 Noun. pollen grain.