Synset

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
<adj.all>

synecdochic

synecdochical

sample sentences

"to use `hand' for `worker' or `ten sail' for `ten ships' or `steel' for `sword' is to use a synecdochic figure of speech"