blas·​to·​derm | \ ˈbla-stə-ˌdərm How to pronounce blastoderm (audio) \

Definition of blastoderm

: a blastodisc after completion of cleavage and formation of the blastocoel

First Known Use of blastoderm

1837, in the meaning defined above

History and Etymology for blastoderm

earlier blastoderma, from blasto- blasto- + -derma -derma

Note: Term originated by the Baltic German embryologist and zoologist Christian Heinrich Pander (1794-1865) in Dissertatio inauguralis sistens historiam metamorphoseos, quam ovum incubatum prioribus quinque diebus subit (Würzburg, 1817), p. 21: "Praeterea enim, quod sibi sedem ac domicilium hoc deligit Embryo, ipsum quoque sua substantia ad ejus configurationem plurimum confert, quare id etiam in posterum blastoderma vocabimus." ("Moreover, because the embryo chooses this as its seat and domicile, and contributes much of its own substance to its configuration, we will henceforth call it the blastoderma.") In the German version of his dissertation (Beiträge zur Entwicklungsgeschichte des Hühnchens im Eye, Würzburg, 1817), Pander translates blastoderma as Keimhaut ("germ-skin").

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The first known use of blastoderm was in 1837

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Cite this Entry

“Blastoderm.” Dictionary, Merriam-Webster, Accessed 27 Sep. 2020.

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blas·​to·​derm | \ -ˌdərm How to pronounce blastoderm (audio) \

Medical Definition of blastoderm

: a blastodisc after completion of cleavage and formation of the blastocoel

called also discoblastula

More from Merriam-Webster on blastoderm Encyclopedia article about blastoderm

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