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blastula

[blas-chuh-luh]
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noun, plural blas·tu·las, blas·tu·lae [blas-chuh-lee] /ˈblæs tʃəˌli/. Embryology.
  1. 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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Compare blastocyst.

Origin of blastula

1885–90; < New Latin < Greek blast(ós) bud, sprout + New Latin -ula -ule
Related formsblas·tu·lar, adjectiveblas·tu·la·tion [blas-chuh-ley-shuh n] /ˌblæs tʃəˈleɪ ʃən/, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for blastula

blastula

noun plural -las or -lae (-liː)
  1. an early form of an animal embryo that develops from a morula, consisting of a sphere of cells with a central cavityAlso called: blastosphere
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Derived Formsblastular, adjective

Word Origin

C19: New Latin; see blasto-
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

Word Origin and History for blastula

n.

embryonic state, 1875, Modern Latin, from Greek blastos "sprout, germ" + diminutive ending -ula.

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Online Etymology Dictionary, © 2010 Douglas Harper

blastula in Medicine

blastula

(blăschə-lə)
n. pl. blas•tu•las
  1. An early embryonic form produced by cleavage of a fertilized ovum and consisting of a spherical layer of cells surrounding a fluid-filled cavity.
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Related formsblastu•lar adj.blas′tu•lation (-lāshən) n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

blastula in Science

blastula

[blăschə-lə]
Plural blastulas blastulae (blăschə-lē′)
  1. 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.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

blastula in Culture

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).

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Note

This is the stage of development where embryonic stems cells can be harvested for medical research.
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.