pollen

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Related to Tricolpate: Eudicots

pollen

 [pol´en]
the male fertilizing element of flowering plants.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

pol·len

(pol'ĕn),
Microspores of seed plants carried by wind or insects before fertilization; important in the etiology of hay fever and other allergies.
[L. fine dust, fine flour]
Farlex Partner Medical Dictionary © Farlex 2012

pollen

The male gametophyte of flowering plants which, once airborne, becomes a major cause of seasonal allergies.

Major allergents
Ragweed and others (e.g., feverfew).
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

pollen

The male gametophyte of flowering plants, a major cause of seasonal allergies; ragweed–and related henchmen–eg, feverfew, has garnered the greatest revulsion among the allergically challenged
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

pol·len

(pol'ĕn)
Microspores of seed plants carried by wind or insects prior to fertilization; important in the etiology of hay fever and other allergies.
[L. fine dust, fine flour]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

pollen

see POLLEN GRAIN.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

pol·len

(pol'ĕn)
Microspores of seed plants carried by wind or insects prior to fertilization; important in the etiology of hay fever and other allergies.
[L. fine dust, fine flour]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
85 Aperture type (0) single (presumably polar, including monosulcate and monoporate) or disulcate (one furrow at each pole), (1) inaperturate, (2) sulculate, (3) (syn)tricolpate with colpi arranged according to Garside's law (with or without alternating colpi), (4) tricolpate.
According to pollen studies of Inceoglu and Karamustafa (1977), Crambe tataria was observed with radially symmetric, isopolar, tricolpate, subprolate pollen grains and the outline shape was elliptic in the equatorial view and circular in the polar view.
The pollen morphology of Crambe cordifolia Steven, istectate, radially symmetric, isopolar, tricolpate, prolate-spheroidal, outline is elliptic in the equatorial view and circular in the polar view.
isoblate-spheroidal, spheroidal and subprolate, radially symmetric, isopolar, tricolpate, reticulate, rarely tetracolpate, polar axis is 15.2-30.2 m and equatorial axis 12.5-27.1 m, outline is elliptic in the equatorial view and circular in the polar view.
are tricolpate, oblate to suboblate, prolate-spheroidal to rarely oblate-spheroidal (Arora and Modi, 2011).
2000, 2003; Hilu et al., 2003), if the tricolpate pollen of Illiciales,
The fossil record indicates that tricolpate pollen originated
Hickey (1976) suggested that tricolpate pollen represents an advance,
there are adaptive reasons for advancing beyond the tricolpate toward
by its large size, its short, wide, tricolpate aperture, and its solid
Other fossils in this family are mainly tricolpate or
Modern pollen in this family is of two types: tricolpate and