briticism
/ˈbrɪtɪˌsɪzəm/
noun
- A word, phrase, or expression that is characteristic of British English rather than other varieties of English.
- She used the Briticism "lorry" when she meant "truck."
- The teacher explained that "flat" is a Briticism for "apartment."
- "Lift" instead of "elevator" is a common Briticism.