from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Biology One of two spiral bands of tissue in an egg that connect the yolk to the lining membrane at either end of the shell.
- n. Botany The region of an ovule that is opposite the micropyle, where the integuments and nucellus are joined.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A spiral band which attaches to the yolk of an egg, suspending it in the white
- n. The location where the nucellus attaches to the integuments, opposite the micropyle.
from the GNU version of the Collaborative International Dictionary of English
- n. The place on an ovule, or seed, where its outer coats cohere with each other and the nucleus.
- n. 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.
from The Century Dictionary and Cyclopedia
- n. 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. 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. Same as chalazion.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. one of two spiral bands of tissue connecting the egg yolk to the enclosing membrane at either end of the shell
- n. basal part of a plant ovule opposite the micropyle; where integument and nucellus are joined
Greek khalaza, hard lump, hailstone.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek χάλαζα (chalaza, "hailstone, lump"). (Wiktionary)