blastoderm

noun blas·to·derm \ -ˌdərm \
|Updated on: 12 Jun 2018

Definition of blastoderm

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

Origin and Etymology of 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").


Medical Dictionary

blastoderm

noun blas·to·derm \ -ˌdərm \

medical Definition of blastoderm

: a blastodisc after completion of cleavage and formation of the blastocoel called also discoblastula

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