A type of art glass, originally and chiefly manufactured in the United States in the late 19th and early 20th centuries, having a characteristic two-tone colour, shading from deep red at the top of the piece of glassware to pale amber at the bottom. Also (and in earliest use) more fully "amberina glass".
The red colour is typically produced by the use of a small amount of gold in the glass, and the two-tone effect is created by reheating the top of the piece of glassware before it is fully cooled. Glass of this type is occasionally manufactured with amber at the top and red at the bottom; this is known as reverse amberina.
Late 19th century; earliest use found in Daily Journal (Milwaukee, Wisconsin). From amber + -ina.