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chalaza

 - 4 dictionary results

cha⋅la⋅za

  [kuh-ley-zuh]
Use chalaza in a Sentence
–noun, plural -zas, -zae  [-zee] .
1. Zoology. one of the two albuminous twisted cords which fasten an egg yolk to the shell membrane.
2. Botany. the point of an ovule or seed where the integuments are united to the nucellus.

Origin:
1695–1705; < NL < Gk: hail, lump

Related forms:
cha⋅la⋅zal, cha⋅la⋅zi⋅an  [kuh-ley-zee-uhn] , adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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cha·la·za   (kə-lā'zə, -lāz'ə)   
n.   pl. cha·la·zae (-zē) or cha·la·zas

  1. 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.

  2. Botany The region of an ovule that is opposite the micropyle, where the integuments and nucellus are joined.


[Greek khalaza, hard lump, hailstone.]
cha·la'zal adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: cha·la·za
Pronunciation: k&-'lA-z&, -'laz-&
Function: noun
Inflected Form: plural cha·la·zae /-"zE/ or cha·la·zas
: either of a pair of spiral bands in the white of a bird's egg that extend from the yolk and attach to opposite ends of thelining membrane
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Science Dictionary
chalaza   (kə-lā'zə)  Pronunciation Key 
Plural chalazae (kə-lā'zē) or chalazas

  1. One of two spiral bands of tissue in an egg that connect the yolk to the lining membrane at either end of the shell.

  2. The region of a plant ovule that is opposite the micropyle, where the integuments and nucellus are joined.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
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