(n) (botany) a slender tubular outgrowth from a pollen grain when deposited on the stigma for a flower; it penetrates the style and conveys the male gametes to the ovule
The Collaborative International Dictionary of English (GCIDE) v.0.53
n. [ L. pollen fine flour, fine dust; cf. Gr. &unr_; ] 1. Fine bran or flour. [ Obs. ] Bailey. [ 1913 Webster ]
2. (Bot.) The fecundating dustlike cells of the anthers of flowers. See Flower, and Illust. of Filament. [ 1913 Webster ]
Pollen grain (Bot.), a particle or call of pollen. -- Pollen mass, a pollinium. Gray. -- Pollen sac, a compartment of an anther containing pollen, -- usually there are four in each anther. -- Pollen tube, a slender tube which issues from the pollen grain on its contact with the stigma, which it penetrates, thus conveying, it is supposed, the fecundating matter of the grain to the ovule. [ 1913 Webster ]
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