meronym

/ (ˈmɛrəʊˌnɪm) /

noun

a part of something used to refer to the whole, such as faces meaning people, as in they've seen a lot of faces come and go

Word Origin for meronym

from Greek meros part + onuma name
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012