(Or "Multiple Master Font") A
font
that is a mixture of two or more other fonts.
A Multiple Master font is a single font containing from two to
sixteen master designs (the current implementation limit). A
weight factor specifies the contribution of each master design
for the creation of a multiple master font
instance.
A Multiple Master instance is a single
interpolation of a
multiple master font as created by a user or application.
ATM Glossary.
Useable fonts.