noun.
The only, single, or sole type, as a species single in its genus, a genus in its family, etc.; a typical representative alone of its kind.
noun.
A print from a metal plate on which a picture is painted, as in oil-color or printers' ink. Only one proof can be made, since the picture is transferred to the paper.
Monotypic.
noun.
The trade-name of a machine which casts and sets in order single types.