Found 2 items, similar to Pollen tube.
English → English (WordNet) Definition: pollen tube pollen tube n : slender tubular outgrown from a pollen grain that penetrates the ovule and releases male gametes
English → English (gcide) Definition: Pollen tube Pollen \Pol"len\, n. [L. pollen fine flour, fine dust; cf. Gr. ?] 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]