de·con·cen·trate [ dee kónss'n tràyt ](past and past participlede·con·cen·trat·ed, present participlede·con·cen·trat·ing, 3rd person present singularde·con·cen·trates)
verb
Definition:
1. transitive and intransitive verb make or become less concentrated: to experience a reduction in concentration or density, or cause something to experience such a reduction