|
|
Definition of Micropyle
1. Noun. Minute opening in the wall of an ovule through which the pollen tube enters.
Definition of Micropyle
1. n. An opening in the membranes surrounding the ovum, by which nutrition is assisted and the entrance of the spermatozoa permitted.
Definition of Micropyle
1. Noun. (botany) In seed-bearing plants, a small opening in the integuments of the ovule through which sperm are able to access the ovum. ¹
¹ Source: wiktionary.com
Definition of Micropyle
1. [n -S]
Medical Definition of Micropyle
1. 1. Small hole or aperture in the protective tissue surrounding a plant ovule, through which the pollen tube enters at fertilization. Develops into a small hole in the seed coat through which, in many cases water enters at germination. 2. Perforation in the shell (chorion) of an insect egg through which the sperm enters at fertilization. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)
Lexicographical Neighbors of Micropyle
Literary usage of Micropyle
Below you will find example usage of this term as found in modern and/or classical literature:
1. The Cell in Development and Inheritance by Edmund Beecher Wilson (1906)
"Where there is but one micropyle, it is usually situated very near the upper or
anterior pole (fishes, many insects), but it may be at the opposite pole ..."
2. The Phytologist: A Popular Botanical Miscellany edited by George Luxford, Edward Newman (1844)
"The swelled knob, b, never extends beyond the micropyle, but is in every stage
... This process does not pass out at the micropyle, but perforates the coats ..."
3. Report of the Annual Meeting (1856)
"Further Observations on the Structure of the Ova of Fishes, with especial reference
to the micropyle, and the Phenomena of their fecundation. ..."
4. The Entomologist's Record and Journal of Variation by James William Tutt, Malcolm Burr (1890)
"micropyle, 12 pear-shaped depressions (same number as macilenta) but very much
smaller and fainter micropyle than macilenta. Not perceptibly funnel-shaped. ..."
5. The Cyclopædia of Anatomy and Physiology. by Robert Bentley Todd (1859)
"The funnel-shaped depression leading to the micropyle may be easily seen on ...
In order to perceive the micropyle itselt, however, or pore in the point of ..."
6. On the Germination, Development, and Fructification of the Higher by Wilhelm Friedrich Benedict Hofmeister, Frederick Currey (1862)
"The pollen of the Conifer® passes through the wide micropyle directly on to the
nucleus. Each pollen-grain sends out into the tissue of the latter—at first ..."
7. The Natural History of Plants: Their Forms, Growth, Reproduction, and by Anton Kerner von Marilaun (1902)
"Pollen is brought to the stigma (not to the micropyle, as in Gymnosperms), and
fertilization is accomplished by the development of pollen-tubes, ..."
Other Resources:
