1. The nutritive material or yolk stored in an egg cell, used to nourish the developing embryo.
Usage: biology; also called deutoplasm or nutritive yolk

Examples

• The deutoplasm in the egg provides essential nutrients for the growing embryo.
• Birds' eggs contain a large amount of deutoplasm to support development.
• The deutoplasm is gradually consumed as the chick develops inside the egg.
• In amphibian eggs, the deutoplasm is unevenly distributed between the animal and vegetal poles.
• The quantity of deutoplasm in an egg determines how long the embryo can develop before hatching.