Uncontrolled proliferation is a hallmark of cancer cells. It expressed that sensitivity to beauty which was the hallmark of the Heian era. Teamwork was the hallmark of Mauer's system. Mausoleums of the Bengal Sultanate are an important architectural hallmark. Jodhpur prospered under the peace and stability that was a hallmark of this era. This departure would become a critical hallmark of the Chekhovian theater. Frankie Valli has become one of the hallmark voices of our generation. DNA fragmentation is a biochemical hallmark of apoptosis. Hasbro, Lego, Sideshow Collectibles, Topps, Diamond Select, Hallmark Cards, and Cartamundi all sold products. Ambiguity is the hallmark of the "Epistles". This programming strategy also creates synergies with Hallmark Cards. That's the hallmark of a great drummer. The thesis would become a hallmark of Stalinism. Grant considered it the hallmark of his administration. Required independent work is a hallmark of undergraduate education at Princeton.