Meslo LG is a customized version of Apple’s Menlo-Regular font (which is a customized Bitstream Vera Sans Mono). It widens the characters slightly and adjusts the horizontal baseline alignment of the asterisk.

The LG in Meslo LG stands for Line Gap. The idea behind it is to allow the user to have some control over vertical spacing by choosing one of three line gap variants: small, medium and large (Meslo LG S, Meslo LG M, and Meslo LG L respectively).

There is also a DZ version of each of these fonts (Meslo LG S DZ, Meslo LG M DZ, and Meslo LG L DZ), which replaces the slash version of the zero character with one with a center dot.