'Britannia metal' definitions:

Definition of 'Britannia metal'

(from WordNet)
noun
An alloy similar to pewter

Definition of 'Britannia metal'

From: GCIDE
  • Britannia \Bri*tan"ni*a\, n. [From L. Britannia Great Britain.] A white-metal alloy of tin, antimony, bismuth, copper, etc. It somewhat resembles silver, and is used for table ware. Called also Britannia metal. [1913 Webster]