[pol-uh n] /ˈpɒl ən/
the fertilizing element of flowering plants, consisting of fine, powdery, yellowish grains or spores, sometimes in masses.
verb (used with object)
a fine powdery substance produced by the anthers of seed-bearing plants, consisting of numerous fine grains containing the male gametes
Daniel. 1813–96, New Zealand statesman, born in Ireland: prime minister of New Zealand (1876)
1760 as a botanical term for the fertilizing element of flowers (from Linnæus, 1751), earlier “fine flour” (1520s), from Latin pollen “mill dust; fine flour,” related to polenta “peeled barley,” and pulvis (genitive pulveris) “dust,” from PIE root *pel- (1) “dust; flour” (cf. Greek poltos “pap, porridge,” Sanskrit pálalam “ground seeds,” Lithuanian pelenai, Old Church Slavonic popelu, Russian pépelŭ “ashes”).
pollen pol·len (pŏl’ən)
Microspores of seed plants carried by wind or insects prior to fertilization.
Powdery grains that contain the male reproductive cells of most plants. In gymnosperms, pollen is produced by male cones or conelike structures. In angiosperms, pollen is produced by the anthers at the end of stamens in flowers. Each pollen grain contains a generative cell, which divides into two nuclei (one of which fertilizes the egg), and a tube cell, which grows into a pollen tube to conduct the generative cell or the nuclei into the ovule. The pollen grain is the male gametophyte generation of seed-bearing plants. In gymnosperms, each pollen grain also contains two sterile cells (called prothallial cells), thought to be remnants of the vegetative tissue of the male gametophyte.
The male sex cells in plants. In flowering plants, pollen is produced in thin filaments in the flower called stamens. (See fertilization and pollination.)
Note: When pollen is carried into the air by the wind, it frequently causes allergic reactions (see allergy) in humans.
- Pollen analysis
noun 1. another name for palynology
noun 1. (of bees) a smooth area on the hind tibia of each leg fringed with long hairs and serving to transport pollen. noun 1. the part of the hind leg of a bee that is specialized for carrying pollen, typically consisting of a trough bordered by long hairs Technical name corbicula
noun 1. the mass of stiff hairs on the legs or abdomen of an insect, for collecting pollen.
noun, Botany. 1. the protoplasmic tube that is extruded from a germinating pollen grain and grows toward the ovule. noun 1. a hollow tubular outgrowth that develops from a pollen grain after pollination, grows down the style to the ovule, and conveys male gametes to the egg cell pollen tube The slender tube that is […]