Germinal disc
Germinal disc may refer to:
In birds
The germinal disc, also called the blastodisc, is a small, circular, white spot (approximately 1.5-3 mm across) on the surface of the yellow yolk of a bird's egg.
In mammals
The blastodisc is a round single-cell layer of cells inside the blastula from which the embryo is going to form.
gollark: There *may* have been *minor* rogue HTech™ von Neumann probes a while ago, but it's probably fine.
gollark: Okay, so just tens of years.
gollark: Intergalactic beams would take hundreds of thousands of years to arrive.
gollark: LyricTech™ doesn't actually have a way to check all of Earth ever for interesting things.
gollark: Against what?
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