Tooth is applied to mountains (or their satellite summits) that resemble incisors, canines, or—in the case of the Mooses Tooth, a well-known 10,300-foot mountain in the Alaska Range—bicuspids. Other pieces of anatomy widely used to describe precipitous topography include head (Lizard Head in Colorado and Cabezon in New Mexico), finger (the Fuhrer Finger is a narrow couloir on Mount Rainer), and thumb (Devils Thumb is a 9,077-foot prong of ice-encrusted diorite on the Alaska– British Columbia border; Zumies Thumb is a distinctive spike of granite in Colorado’s Rocky Mountain National Park).

Jon Krakauer