This egg is yolkless.

The yolkiness of the egg made the omelette rich and creamy.

This omelette is yolkier than the previous one.

This is the yolkiest omelette I've ever had.

I cracked the yolker and separated the yolk from the egg white.

The yolkers were delicious.

The yolksac is an important structure in embryonic development.

The surgeon removed the yolksacs during the operation.

The yolklessness of the egg was a surprise.