piston Noun, n, piston piston (music) piston Appox. usage (any sense): 1.2 per million words Appox. usage (any sense): 1.2 per million words
pistonfon Noun, n, pistonfon piston Appox. usage (any sense): less than 0.1 per million words Appox. usage (any sense): less than 0.1 per million words