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 (kə-lā′zə, -lăz′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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n, pl -zas or -zae (-ziː)
1. (Zoology) one of a pair of spiral threads of albumen holding the yolk of a bird's egg in position
2. (Botany) the basal part of a plant ovule, where the integuments and nucellus are joined
[C18: New Latin, from Greek: hailstone]
chaˈlazal adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(kəˈleɪ zə)

n., pl. -zas, -zae (-zē).
1. one of the two albuminous twisted cords fastening an egg yolk to the shell membrane.
2. the point of an ovule or seed where the integuments are united to the nucellus.
[1695–1705; < New Latin < Greek: hail, lump]
cha•la′zal, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.chalaza - basal part of a plant ovule opposite the micropyle; where integument and nucellus are joined
ovule - a small body that contains the female germ cell of a plant; develops into a seed after fertilization
plant part, plant structure - any part of a plant or fungus
2.chalaza - one of two spiral bands of tissue connecting the egg yolk to the enclosing membrane at either end of the shell
egg - animal reproductive body consisting of an ovum or embryo together with nutritive and protective envelopes; especially the thin-shelled reproductive body laid by e.g. female birds
animal tissue - the tissue in the bodies of animals
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
(2000a) interpreted the position of the seed as basal (ascendent) because the micropyle is directed toward the presumed stigmatic end of the carpel, but Doyle and Endress (2014) argued that the off-center position of the chalaza is typical of orthotropous ovules that are apical (pendent).
These cells present cytoplasm that is intensely stained by safranin, Epidermal cells at the base of the funiculus are enlarged radially forming a projection with 5-6 layers of parenchyma cells (see Figure 4H) which are not glandular in appearance, The integuments are multi-layered and covered by cuticle, The outer integument consists of 2-4 layers of isodiametric cells that are variable in size, while the inner integument is thicker with multiple layers of cells in the micropyle region, The vascular tissue occurs in the outer integument and extends from the chalaza to the inner integument (see Figure 41).
Chalaza (keh-laz-eh) The pair of protein bands that hold the yolk in the center of the egg.
Presencia o ausencia de una serie de caracteristicas que son diagnosticas para la especie: hilo seminal, arilo, micropila, rafe, caruncula, chalaza y radicula (Burkart, 1952)
Head capsule 1.8 mm wide, color varies from uniform dark brown to dark brown with partially light brown areas; toothed horn and seven conical protuberances on each robe; color varies from bright yellow to dark brown; a protuberance (chalaza) on each side of dorsal epicranium (vertex) with a dark brown to black seta; some spatulate setae on horns and conical protuberances (same in remaining instars).