Definition of polymatype in US English:

polymatype

noun

Printing
rare, historical
  • A system of typecasting by which a large number of types can be produced simultaneously; a machine used for this.

Origin

Late 19th century. Apparently from French Polymatype the name of a machine for casting multiple types (not dated in dictionaries of French) from poly + ma- (perhaps in either matrice or machine) + type.

Pronunciation

polymatype

/ˈpɒlɪmətʌɪp/