blastoderm

[ blas-tuh-durm ]

/ ˈblæs təˌdɜrm /

noun Embryology.

the primitive layer of cells that results from the segmentation of the ovum.

the layer of cells forming the wall of the blastula, and in most vertebrates enclosing a cavity or a yolk mass.

Words nearby blastoderm

blastochyle, blastocoel, blastocyst, blastocyte, blastocytoma, blastoderm, blastodermic vesicle, blastodisc, blastodisk, blastoff, blastogenesis

Origin of blastoderm

First recorded in 1855–60; blasto- + -derm

OTHER WORDS FROM blastoderm

blas·to·der·mic, blas·to·der·mat·ic, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for blastoderm

It is shewn in fig. 30 A, where bl points to the blastoderm, and yk to the part of the yolk not yet covered by the blastoderm.
The Works of Francis Maitland Balfour, Volume III (of 4)|Francis Maitland Balfour
The nuclei of the blastoderm cells, both of the epiblast and lower layer, have a uniform structure.
The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour
Transverse sections shew that considerable changes have been effected in the constitution of the blastoderm.
The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour
The blastoderm thus rests upon a mass of finely granular material, from which, however, it is sharply separated.
The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour

At the same time a median depression appears dividing the blastoderm longitudinally into two halves.
The Works of Francis Maitland Balfour, Volume II (of 4)|Francis Maitland Balfour

British Dictionary definitions for blastoderm

blastoderm

/ (ˈblæstəʊˌdɜːm) /

noun embryol

the layer of cells that surrounds the blastocoel of a blastula

a flat disc of cells formed after cleavage in a heavily yolked egg, such as a bird's egg

Also called: blastodisc

Derived forms of blastoderm

blastodermic, 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

Medicine definitions for blastoderm

blastoderm

[ blăs′tə-dûrm′ ]

n.

The layer of cells formed by the cleavage of a fertilized mammalian egg, which later divides into the three germ layers from which the embryo develops.germinal membrane germ membrane

Other words from blastoderm

blas′to•der′mal null null adj.