synecdoche
[L. a. Gk synekdoche] /suh NEK duh kee/ (rhymes with Schenectady* : )
a figure by which a more comprehensive term is used for a less comprehensive or vice versa; as whole for part or part for whole, genus for species or species for genus, etc. (compare metonymy) [wwftd]

*see the movie, Synecdoche, New York (2008)

edit: bemused by the definitions? this probly won't help..
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Last edited by tsuwm; 02/03/2010 3:28 PM.