Pollen sac
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]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • pollen sac — noun : one of the sacs in a seed plant that contain the pollen and that are initially four in number but are commonly reduced to two by disintegration of the intervening walls in the mature anther * * * Bot. one of the cavities in an anther in… …   Useful english dictionary

  • pollen sac — noun Date: 1875 one of the pouches of a seed plant anther in which pollen is formed …   New Collegiate Dictionary

  • pollen sac — Bot. one of the cavities in an anther in which pollen is produced. [1870 75] * * * …   Universalium

  • 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… …   The Collaborative International Dictionary of English

  • Pollen grain — 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]… …   The Collaborative International Dictionary of English

  • Pollen mass — 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]… …   The Collaborative International Dictionary of English

  • 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]… …   The Collaborative International Dictionary of English

  • Pollen — Tip of a tulip stamen with many grains of pollen Closeup image of a cac …   Wikipedia

  • pollen mother cell — noun Date: 1884 a cell that is derived from the hypodermis of the pollen sac and that gives rise by meiosis to four cells each of which develops into a pollen grain …   New Collegiate Dictionary

  • pollen mother cell — noun : a cell that is derived from the hypodermis of the pollen sac and that gives rise by meiosis to four cells, each of which develops into a pollen grain …   Useful english dictionary

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