blastula [ blas-ch uh-l uh ] SHOW IPA / ˈblæs tʃə lə / PHONETIC RESPELLING WORD ORIGIN noun, plural blas·tu·las, blas·tu·lae . [ blas-ch uh-lee] /ˈblæs tʃəˌli/ . Embryology 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. Origin of blastula 1885–90;
) bud, sprout +
New Latin -ula -ule Related forms blas·tu·lar, adjective blas·tu·la·tion , [blas-ch uh- ley-sh uh n] /ˌblæs tʃəˈleɪ ʃən/ noun
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for blastulation noun embryol the process of blastula formation noun plural -las or -lae ( -liː) 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 Derived Forms blastular, adjective Word Origin for blastula
C19: New Latin; see
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for blastulation n.
embryonic state, 1875, Modern Latin, from Greek
blastos "sprout, germ" + diminutive ending -ula.
Online Etymology Dictionary, © 2010 Douglas Harper
Medicine definitions for blastulation n. pl. blas•tu•las An early embryonic form produced by cleavage of a fertilized ovum and consisting of a spherical layer of cells surrounding a fluid-filled cavity. Related forms blas ′tu•lar adj. blas′tu•la ( ′tion -lā) ′shən n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Science definitions for blastulation Plural blastulas blastulae ( blăs) ′chə-lē′ 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.
Culture definitions for blastulation
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.