| pollen | <plant biology> The microspores of seed plants, the powdery mass of microspores shed from anthers. (09 Oct 1997) |
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| pollen antigen | An extract of the antigenic protein from the pollen of plants; i.e., pollen allergen, used in the diagnosis and prevention of hay fever. (05 Mar 2000) |
| pollen extract | Liquid obtained by extracting the protein from the pollen of plants used for diagnostic testing or treatment. (05 Mar 2000) |
| pollen mother cell | <plant biology> A diploid plant cell that forms four microspores by meiosis, the microspores give rise to pollen grains in seed plants. (18 Nov 1997) |