De Pollen

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• POLLEN — L’étude du contenu vivant du pollen – relativement peu différencié et difficile à observer – est un peu éclipsée par celle de la membrane pollinique [cf. PALYNOLOGIE]. La fonction biologique fondamentale du pollen dans la reproduction sexuée des… …   Encyclopédie Universelle

• 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 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]… …   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 count — is the measurement of the number of grains of pollen in a cubic meter of air. The higher the number, the more people will suffer if they are allergic to a particular pollen . Usually, the counts are announced for specific plants such as grass,… …   Wikipedia

• Pollen zone — Pollen zones are a system of subdividing late Pleistocene and early Holocene paleoclimate using the data from pollen cores. The sequence provides a global chronological structure to a wide variety of scientists, such as geologists,… …   Wikipedia

• Pollen — Sm Blütenstaub erw. fach. (14. Jh.) Entlehnung. Entlehnt mit der Bedeutung feines Mehl, Staubmehl aus l. pollen n. gleicher Bedeutung. Die Bedeutung Blütenstaub ist neuzeitlich und international. Das lateinische Wort gehört zu einer Wortfamilie,… …   Etymologisches Wörterbuch der deutschen sprache

• pollen count — pollen counts N COUNT The pollen count is a measure of how much pollen is in the air at a particular place and time. Information about the pollen count is given to help people who are made ill by pollen. Avoid trips to the country while the… …   English dictionary

• Pollen wasp — Pollen wasps Pseudomasaris vespoides Scientific classification Kingdom: Animalia …   Wikipedia