Noun
sugar cube (plural sugar cubes)
Piece of sugar in the shape of a cube (or approximate cube), often used for coffee or tea.
Synonym: sugar lump
sugar-cube
We are less than a decade away from the medical lab the size of a sugar cube. Philippe Kahn
Nanotechnology will let us build computers that are incredibly powerful. We'll have more power in the volume of a sugar cube than exists in the entire world today. Ralph Merkle
I liked the idea of all of humanity fitting inside a sugar cube because more than 99.9% of matter is space. Alan Davies