Chicken vs Egg - Mander

At which point does an egg of non-chicken become an egg of chicken?
Is a “chicken egg” an egg laid by a chicken, or an egg that will hatch into a chicken?
I think it’s an egg laid by a chicken. Unfertilized eggs laid by chickens that will never become chickens are still chicken eggs.
We’re not talking about eggs laid by chickens, we’re talking about eggs laid by the things that weren’t quite chickens, but the eggs of which contain chickens, due to a novel DNA combination.
The question posed is what is a chicken egg? Is it an egg from which a chicken hatches or an egg which a chicken lays. I’d argue it’s the latter. Because we already consider eggs from which no chicken could hatch but that a chicken laid, chicken eggs.