CHALAZA

chalaza

(noun) one of two spiral bands of tissue connecting the egg yolk to the enclosing membrane at either end of the shell

chalaza

(noun) basal part of a plant ovule opposite the micropyle; where integument and nucellus are joined

Source: WordNet® 3.1


Etymology

Noun

chalaza (plural chalazas or chalazae)

(botany) The location where the nucellus attaches to the integuments, opposite the micropyle.

(zoology) One of the two spiral bands which attach the yolk of an egg to the eggshell, suspending it in the white.

Synonyms

• cicatricula

• kenning (obsolete)

• tread, treadle

Source: Wiktionary


Cha*la"za, n.; pl. E. Chalazas, L. Chalazæ. Etym: [NL., fr. Gr.

1. (Bot.)

Definition: The place on an ovule, or seed, where its outer coats cohere with each other and the nucleus.

2. (Biol.)

Definition: 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.

Source: Webster’s Unabridged Dictionary 1913 Edition



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Word of the Day

14 March 2025

PARASITISM

(noun) the relation between two different kinds of organisms in which one receives benefits from the other by causing damage to it (usually not fatal damage)


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