"synecdochic" in the adjective sense
1. synecdochic, synecdochical
using the name of a part for that of the whole or the whole for the part or the special for the general or the general for the special or the material for the thing made of it
"to use `hand' for `worker' or `ten sail' for `ten ships' or `steel' for `sword' is to use a synecdochic figure of speech"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License