Definition of synecdochical:
(adj) :
Using an inclusive term for something included, or vice versa; using the term for a part or component to mean the whole (as "hand" for "laborer") or vice versa (as "the court" for "the judge").
(adj) :
Of, relating to, or exhibiting synecdoche.
(adj) :
(in extended use) Of a whole: representing its components; of a part representing the whole.