Metonym‏ [Noun.]

‘The relatedness of meaning found in polysemy is essentially based on similarity. The head of a company is similar to the head of a person on top of and controlling the body. There is another relationship between words, based simply on a close connection in everyday experience. That close connection can be based on a container-contents relation (battle/water, can/juice), a whole-part relation (car/wheels, house/roof) or a representative-symbol relationship (king/crown, the President/the White House). Using one of these words to refer to the other is an example metonymy.’

– Yule, G. 1985. The Study of Language Cambridge, United Kingdom: Cambridge University Press (2010) p. 121