yolk
nounUK /jəʊk/
US /joʊk/
The yellow part in the middle of an egg.
She dipped her toast into the runny yolk.
OTHER MEANINGS
2. The greasy, yellowish substance in wool.
The farmer cleaned the yolk from the fleece before spinning it.
3. The stored food material inside an egg that feeds the growing baby animal.
The yolk provides nutrients for the chick as it develops.
4. The central or most important part of something.
The yolk of the plan was the new budget.