Boiled eggs are eggs (typically chicken eggs) cooked with their shells unbroken, usually by immersion in boiling water.
Hard-boiled eggs are cooked so that the egg white and egg yolk both solidify.
While for a soft-boiled egg the yolk, and sometimes the white, remain at least partially liquid.
A few different ways are used to make boiled eggs other than simply immersing them in boiling water.
Boiled eggs can also be cooked below the boiling temperature, via coddling, or they can be steamed.
The egg timer was so-named due to its common usage in timing the boiling of eggs.
Boiled eggs are a popular breakfast food in many countries around the world. (source)
So can hamsters eat boiled eggs?
Yes they can eat boiled eggs, a slice of boiled egg twice a week is good for them.
Make sure they are hard boiled eggs and not runny though. They prefer them that way.