Material design and Material UI

Since I am new to Material design, I am having some clarification

1) What is material design? Common CSS material design framework?

2) Difference between material design and material UI? Material UI is used only in react?

3) In HTML to implement bootstrap, I will include a bootstrap external link to my header, likewise, there is an option to implement material UI in HTML.

4) I like speed dial in material UI, how to use it in my plain HTML:

https://material-ui.com/components/speed-dial/

Thanks in advance.