blastoderm

[ blas-tuh-durm ]

/ ˈblæs təˌdɜrm /

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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.

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Origin of blastoderm

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

OTHER WORDS FROM blastoderm

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

Words nearby blastoderm

blast lamp, blasto-, blastochyle, blastocoel, blastocyst, blastoderm, blastodisc, blastodisk, blastoff, blastogenesis, blastoma

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use blastoderm in a sentence

For hardening the blastoderm I have employed, as usual, chromic acid, and also gold chloride.
The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour
If the outlines only of the cells are to be examined, a very short immersion (half a minute) of the blastoderm in a half per cent.
The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour
My observations begin with the blastoderm of a freshly laid egg.
The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour
The changes which the blastoderm undergoes during the first three or four hours of incubation are not very noticeable.
The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour

I have already spoken of the gradation of the hypoblast at the edge of the blastoderm into white yolk.
The Works of Francis Maitland Balfour, Volume 1|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