chalaza
Zoology. one of the two albuminous twisted cords which fasten an egg yolk to the shell membrane.
Botany. the point of an ovule or seed where the integuments are united to the nucellus.
Origin of chalaza
1Other words from chalaza
- cha·la·zal, cha·la·zi·an [kuh-ley-zee-uhn], /kəˈleɪ zi ən/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
British Dictionary definitions for chalaza
/ (kəˈleɪzə) /
one of a pair of spiral threads of albumen holding the yolk of a bird's egg in position
the basal part of a plant ovule, where the integuments and nucellus are joined
Origin of chalaza
1Derived forms of chalaza
- chalazal, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for chalaza
[ kə-lā′zə ]
One of two spiral bands of tissue in an egg that connect the yolk to the lining membrane at either end of the shell.
The region of a plant ovule that is opposite the micropyle, where the integuments and nucellus are joined.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Browse