Missed miscarriage? What is it?

Ki

So with my first pregnancy—I miscarried. I should have been 10 weeks, went in for my YS and they concluded the baby had stopped growing at 6 weeks.

I’d had no bleeding or cramps or pain. They did booodwork to confirm my numbers were dropping and then I had a D and C.

Would this be considered a missed miscarriage? If not, what actually is a missed miscarriage?