RhymeZone: bostonite definitions

Definitions of Bostonite:

adjective: Bostonian: of, from, or pertaining to Boston.
noun: (uncountable) A fine-grained, pale-colored, grey or pinkish intrusive rock, which consists essentially of alkali-feldspar.
noun: A Bostonian: a person who lives in or comes from Boston.

(Definitions from Wiktionary)