noun
- The disk-shaped area of cytoplasm on the surface of a yolk-filled egg from which the embryo develops; the germinal disk.
Usage: biology; embryology; technical
Examples
- The blastodisc appears as a small white spot on the surface of a bird egg.
- In avian development, the blastodisc is where cell division begins after fertilization.
- The blastodisc contains the genetic material that will form the embryo.
- Embryologists study the blastodisc to understand early stages of development.
- The size and appearance of the blastodisc can indicate the egg's developmental stage.