chalaza

Definitions

  • WordNet 3.6
    • n chalaza one of two spiral bands of tissue connecting the egg yolk to the enclosing membrane at either end of the shell
    • n chalaza basal part of a plant ovule opposite the micropyle; where integument and nucellus are joined
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Webster's Revised Unabridged Dictionary
  • Interesting fact: The stringy thing that is seen in egg whites is called "chalazae."
    • Chalaza (Biol) A spiral band of thickened albuminous substance which exists in the white of the bird's egg, and serves to maintain the yolk in its position; the treadle.
    • Chalaza (Bot) The place on an ovule, or seed, where its outer coats cohere with each other and the nucleus.
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Century Dictionary and Cyclopedia
    • n chalaza In botany, that part of the ovule or seed where the integuments cohere with each other and with the nucleus. It is the true base of the seed, but corresponds to the hilum or scar only in some cases.
    • n chalaza In zoology, one of the two albuminous twisted cords which bind the yolk-bag of an egg to the lining membrane at the two ends of the shell, and keep it near the middle as it floats in the albumen, so that the cicatricula or germinating point is always uppermost, and consequently nearest the source of heat during the process of incubation. Also called pullet-sperm and treadle.
    • n chalaza Same as chalazion.
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Etymology

Webster's Revised Unabridged Dictionary
NL., fr. Gr. hail, pimple

Usage

In literature:

He considers the centre of the hilum as the base, and the chalaza, where it exists, as the natural apex of the seed.
"Narrative of a Survey of the Intertropical and Western Coasts of Australia] [Volume 2 of 2]" by Phillip Parker King
CHALAZA, one of the two filaments attached to the ends of the yoke of an egg to steady it in the albumen.
"The Nuttall Encyclopaedia" by Edited by Rev. James Wood
Seeds larger than AEstivalis, pear-shaped; chalaza roundish.
"Manual of American Grape-Growing" by U. P. Hedrick
CHALAZA, the place where the coats and the kernel of the ovule blend.
"The Elements of Botany" by Asa Gray
Here it is inclosed in a membranous covering, called the chalazae, and receives a coating of thick albumen.
"Our Domestic Birds" by John H. Robinson
Look for the chalaza.
"A Guide for the Study of Animals" by Worrallo Whitney
It has been already stated that the radicle of the embryo is directed to the micropyle, and the cotyledons to the chalaza.
"Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3" by Various
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