verb (used with object), con·cen·trat·ed, con·cen·trat·ing.
verb (used without object), con·cen·trat·ed, con·cen·trat·ing.
Examples from the Web for concentrative
We shall give you a practical working knowledge of concentrative mental methods and devices.Psychology and Achievement|Warren Hilton
He found it demand a concentrative effort, and Harry was very sorry and even ashamed, but he loved least to read that way.Young Blood|E. W. Hornung
C D is also concentrative, though less so than B C, and is more strongly sensational.A Newly Discovered System of Electrical Medication|Daniel Clark
I'll see if I can't develop my concentrative faculty and introduce a few of the same performances in our show.The Sorcery Club|Elliott O'Donnell
In trades where the concentrative process has proceeded furthest this warfare is naturally fiercest.Problems of Poverty|John A. Hobson