dental formula - dental formula; dental formula - Formula indicating, for a given species of mammal, the number of each kind of its teeth. The number in the upper jaw of one side is written above that in the lower jaw of one side; and the categories are given in the order: incisors, canines, pre-molars, molars. The formula of the primitive mammal is i3/3.c1/1.p4/4.m3/3. The human formula is i2/2.c1/1.p2/2.m3/3.