Elfenbein avorio elfenben ivoire ivoor ivory (material) marfil slonovača ελεφαντόδοντο שנהב The modified form of dentin derived from animal teeth. The most common example is from the tusks of mature elephants; similar material is obtained from any tusked or large-toothed mammal such as a walrus or narwhal (AAT). For imitation ivory use artifical ivory .