blastula
the early developmental stage of an animal, following the morula stage and consisting of a single, spherical layer of cells enclosing a hollow, central cavity.
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Origin of blastula
1Other words from blastula
- blas·tu·lar, adjective
- blas·tu·la·tion [blas-chuh-ley-shuhn], /ˌblæs tʃəˈleɪ ʃən/, noun
- Compare blastocyst.
Words Nearby blastula
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use blastula in a sentence
The hollow sphere which is thus formed is the important stage of the “germinal vesicle,” the blastula, or blastosphere.
Consider its mode of division, and the formation of the blastula, gastrula, and germinal layers.
The Biological Problem of To-day | Oscar HertwigIn a blastula showing complete segmentation the blastomeres of the upper hemisphere are the more finely subdivided.
A Guide to the Study of Fishes, Volume 1 (of 2) | David Starr JordanOur next question concerns the distribution of potentiality, when the embryo is developed further than the blastula stage.
But there is in the blastula no trace of one part of the germ becoming different with respect to others of its parts.
The Science and Philosophy of the Organism | Hans Driesch
British Dictionary definitions for blastula
/ (ˈblæstjʊlə) /
an early form of an animal embryo that develops from a morula, consisting of a sphere of cells with a central cavity: Also called: blastosphere
Origin of blastula
1Derived forms of blastula
- blastular, 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 blastula
[ blăs′chə-lə ]
An animal embryo at the stage immediately following the division of the fertilized egg cell, consisting of a ball-shaped layer of cells around a fluid-filled cavity known as a blastocoel. Compare gastrula. See also blastocyst.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Cultural definitions for blastula
[ (blas-chuh-luh) ]
The stage of an embryo that consists of just over a hundred cells — a stage reached about one week after fertilization. At this stage the cells are just at the very beginning of cellular differentiation and are said to be totipotent (See totipotency).
Notes for blastula
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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