gastrula

[ gas-troo-luh ]

/ ˈgæs trʊ lə /

noun, plural gas·tru·las, gas·tru·lae [gas-troo-lee]. /ˈgæs trʊˌli/. Embryology.

a metazoan embryo in an early state of germ layer formation following the blastula stage, consisting of a cuplike body of two layers of cells, the ectoderm and endoderm, enclosing a central cavity, or archenteron, that opens to the outside by the blastopore: in most animals progressing to the formation of a third cell layer, the mesoderm.

Origin of gastrula

From New Latin, dating back to 1875–80; see origin at gastro-, -ule

OTHER WORDS FROM gastrula

gas·tru·lar, adjectivepre·gas·tru·lar, adjective

Words nearby gastrula

gastrotomy, gastrotonometry, gastrotrich, gastrotropic, gastrovascular, gastrula, gastrulate, gastrulation, gas tube, gas turbine, gas up

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for gastrula

But how is an adult worm or vertebrate formed out of such a gastrula?
The Whence and the Whither of Man|John Mason Tyler
The cell-aggregate then differentiates into layers, and forms, in fact, a two-layered sac called a gastrula.
Evolution|Joseph Le Conte
The two layers of the gastrula may now be spoken of as ectoderm and entoderm.
The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour
Gastrula: that embryonic stage resembling a sac, with an outer layer of epiblastic cells and an inner layer of hypoblastic cells.
Explanation of Terms Used in Entomology|John. B. Smith

The formation of the gastrula and behaviour of the blastopore: together with the origin of the hypoblast.
The Works of Francis Maitland Balfour, Volume III (of 4)|Francis Maitland Balfour

British Dictionary definitions for gastrula

gastrula

/ (ˈɡæstrʊlə) /

noun plural -las or -lae (-ˌliː)

a saclike animal embryo consisting of three layers of cells (ectoderm, mesoderm, and endoderm) surrounding a central cavity (archenteron) with a small opening (blastopore) to the exteriorSee also ectoderm, mesoderm, endoderm

Derived forms of gastrula

gastrular, adjective

Word Origin for gastrula

C19: New Latin: little stomach, from Greek gastēr belly

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

Medical definitions for gastrula

gastrula

[ găs′trə-lə ]

n. pl. gas•tru•las

An embryo at the stage following the blastula, consisting of a hollow, two-layered sac of ectoderm and endoderm surrounding an archenteron that communicates with the exterior through the blastopore.

Scientific definitions for gastrula

gastrula

[ găs′trə-lə ]

Plural gastrulas gastrulae (găs′trə-lē′)

An animal embryo at the stage following the blastula. The gastrula develops from the blastula by invagination (inpocketing), forming an inner cavity with an opening and causing the cells to be distributed into an outer layer (ectoderm) and an inner layer (endoderm). In complex animals such as vertebrates, a third layer (mesoderm) also forms. These layers later develop into the organs and tissues of the body. In vertebrates and other deuterostomes, the opening of the gastrula becomes the anus, while in protostomes (such as arthropods), it becomes the mouth.♦ The development of an embryo from blastula to gastrula is called gastrulation. Compare blastula.

单词	gastrula
释义	gastrula [ gas-troo-luh ] / ˈgæs trʊ lə / noun, plural gas·tru·las, gas·tru·lae [gas-troo-lee]. /ˈgæs trʊˌli/. Embryology. a metazoan embryo in an early state of germ layer formation following the blastula stage, consisting of a cuplike body of two layers of cells, the ectoderm and endoderm, enclosing a central cavity, or archenteron, that opens to the outside by the blastopore: in most animals progressing to the formation of a third cell layer, the mesoderm. Origin of gastrula From New Latin, dating back to 1875–80; see origin at gastro-, -ule OTHER WORDS FROM gastrula gas·tru·lar, adjectivepre·gas·tru·lar, adjective Words nearby gastrula gastrotomy, gastrotonometry, gastrotrich, gastrotropic, gastrovascular, gastrula, gastrulate, gastrulation, gas tube, gas turbine, gas up Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for gastrula But how is an adult worm or vertebrate formed out of such a gastrula? The Whence and the Whither of Man\|John Mason Tyler The cell-aggregate then differentiates into layers, and forms, in fact, a two-layered sac called a gastrula. Evolution\|Joseph Le Conte The two layers of the gastrula may now be spoken of as ectoderm and entoderm. The Works of Francis Maitland Balfour, Volume 1\|Francis Maitland Balfour Gastrula: that embryonic stage resembling a sac, with an outer layer of epiblastic cells and an inner layer of hypoblastic cells. Explanation of Terms Used in Entomology\|John. B. Smith The formation of the gastrula and behaviour of the blastopore: together with the origin of the hypoblast. The Works of Francis Maitland Balfour, Volume III (of 4)\|Francis Maitland Balfour British Dictionary definitions for gastrula gastrula / (ˈɡæstrʊlə) / noun plural -las or -lae (-ˌliː) a saclike animal embryo consisting of three layers of cells (ectoderm, mesoderm, and endoderm) surrounding a central cavity (archenteron) with a small opening (blastopore) to the exteriorSee also ectoderm, mesoderm, endoderm Derived forms of gastrula gastrular, adjective Word Origin for gastrula C19: New Latin: little stomach, from Greek gastēr belly 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 Medical definitions for gastrula gastrula [ găs′trə-lə ] n. pl. gas•tru•las An embryo at the stage following the blastula, consisting of a hollow, two-layered sac of ectoderm and endoderm surrounding an archenteron that communicates with the exterior through the blastopore. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for gastrula gastrula [ găs′trə-lə ] Plural gastrulas gastrulae (găs′trə-lē′) An animal embryo at the stage following the blastula. The gastrula develops from the blastula by invagination (inpocketing), forming an inner cavity with an opening and causing the cells to be distributed into an outer layer (ectoderm) and an inner layer (endoderm). In complex animals such as vertebrates, a third layer (mesoderm) also forms. These layers later develop into the organs and tissues of the body. In vertebrates and other deuterostomes, the opening of the gastrula becomes the anus, while in protostomes (such as arthropods), it becomes the mouth.♦ The development of an embryo from blastula to gastrula is called gastrulation. Compare blastula. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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