chalaza
Americannoun
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chalazas,
plural
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chalazae
plural
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Zoology. one of the two albuminous twisted cords which fasten an egg yolk to the shell membrane.
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Botany. the point of an ovule or seed where the integuments are united to the nucellus.
noun
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one of a pair of spiral threads of albumen holding the yolk of a bird's egg in position
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the basal part of a plant ovule, where the integuments and nucellus are joined
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chalazae
plural
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One of two spiral bands of tissue in an egg that connect the yolk to the lining membrane at either end of the shell.
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The region of a plant ovule that is opposite the micropyle, where the integuments and nucellus are joined.
Other Word Forms
Derived Forms
Inflected Forms
Nouns
Etymology
Origin of chalaza
1695–1705; < New Latin < Greek: hail, lump
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
Campylotropous or Incurved, in which, by the greater growth of one side, the ovule curves into a kidney-shaped outline, so bringing the orifice down close to the base or chalaza; as in Fig.
From The Elements of Botany For Beginners and For Schools by Asa Gray
The same, cut through lengthwise: a, the hilum; c, chalaza; d, outer seed coat; e, inner seed-coat; f, the albumen; g, the minute embryo.
From The Elements of Botany For Beginners and For Schools by Asa Gray
Seeds variable in size and shape, usually notched at upper end and characterized always by a bottle-necked, elongated beak; chalaza broad, usually rough, distinct; raphe indistinct.
From Manual of American Grape-Growing by U. P. Hedrick
Seeds few, small, short, plump, oval or roundish, with short beak; chalaza oval or roundish, distinct; raphe narrow, slightly distinct to indistinct.
From Manual of American Grape-Growing by U. P. Hedrick
Orthotropous ovule of Buckwheat: c, hilum and chalaza; f, orifice.
From The Elements of Botany For Beginners and For Schools by Asa Gray
A pair of fibrous strands called chalazae anchor the yolk inside the egg, and Geary figured that sundering them would allow the yolk to float to the center.
From New York Times ● Oct. 14, 2012
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