Margin : The unprinted edging surrounding or dividing a sheet of stamps.

MC : Maltese Cross cancel. Used to cancel Queen Victoria stamps e.g. 1d Black. These may be in black, red, yellow, blue or magenta and comprises an eight pointed cross

Miniature Sheet : A small sheet having single or more stamps with a margin on all sides bearing some special wording or design.

Mint : The condition of a stamp which has not been used. There are several states of mint. e.g. Unmounted Mint or Mint Never Hinged, Lightly Mounted mint ( where the stamp has been mounted in an album with some care) or, Mounted Mint ( where the hinge marks are heavy and affect the gum).