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Definition of Chalaza
1. Noun. Basal part of a plant ovule opposite the micropyle; where integument and nucellus are joined.
2. Noun. One of two spiral bands of tissue connecting the egg yolk to the enclosing membrane at either end of the shell.
Definition of Chalaza
1. n. The place on an ovule, or seed, where its outer coats cohere with each other and the nucleus.
Definition of Chalaza
1. Noun. (zoology) A spiral band which attaches to the yolk of an egg, suspending it in the white ¹
2. Noun. (botany) The location where the nucellus attaches to the integuments, opposite the micropyle. ¹
¹ Source: wiktionary.com
Definition of Chalaza
1. a band of tissue in an egg [n -ZAS or -ZAE] : CHALAZAL [adj]
Medical Definition of Chalaza
1. In botany terminology, the part of an ovule to which the end of the stalk (funicle) is attached. (09 Oct 1997)
Lexicographical Neighbors of Chalaza
Literary usage of Chalaza
Below you will find example usage of this term as found in modern and/or classical literature:
1. A Manual of the Botany of the Northern United States by Asa Gray (1880)
"In this kind, the orifice (/) is at the top, the chalaza and the hilum (c) are
blended at the base or point of attachment, which is at the opposite end ..."
2. A Class-book of Botany: Designed for Colleges, Academies, and Other by Alphonso Wood (1869)
"The stalk by which the ovule is connected to the placenta, is called the funiculus,
and its point of attachment to the nucleus of the ovule, the chalaza. ..."
3. Illustrated Descriptive Catalogue of American Grape Vines: A Grape Growers by Bush & Son & Meissner (1883)
"The seeds of the cultivated varieties do not differ from these ; they are all
large, notched on top ; chalaza generally depressed and no raphe is visible in ..."
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