Definition of blastoderm in English:

blastoderm

noun

Embryology
  • A blastula having the form of a disc of cells on top of the yolk.

    • ‘When the membranes surrounding the peripheral nuclei fuse to form the 6000 cells of the cellular blastoderm, they enclose 175-225 polyploid yolk nuclei within a large syncytial yolk cell.’
    • ‘When the egg is laid, the blastoderm contains several hundred cells.’
    • ‘Pole cells cease dividing after the formation of the cellular blastoderm.’
    • ‘As a result, the blastodisc on the yolk becomes a blastoderm.’
    • ‘At cellular blastoderm most of the EAR protein is associated with cells at the periphery, while some protein is still associated with yolk nuclei.’

Pronunciation

blastoderm

/ˈblastə(ʊ)dəːm/