I Space Group Symmetry: What is F d3m Spinel Structure?

[Rzbs]

TL;DR Summary

Notations in space group symmetries

What does mean spinel structure has F d3m space group? I know F is for face centred cubic, 3 is 3-fold symmetry and m is mirror, but I don't know what means "d"?

 

[DrDu]

This is a so called diamond glide plane: https://en.wikipedia.org/wiki/Glide_plane?wprov=sfla1

 

[Rzbs]

This is a so called diamond glide plane: https://en.wikipedia.org/wiki/Glide_plane?wprov=sfla1

Thanks, so is it the same F 4- 3 m?