Tusks.
D000818:Animals; D003481:Cuspid / Q000033:anatomy & histology; D003804:Dentin / Q000033:anatomy & histology; D004606:Elephants / Q000033:anatomy & histology; D005580:Fossils; D049690:History, Ancient; D007180:Incisor / Q000033:anatomy & histology; D008297:Male; D008322:Mammals / Q000033:anatomy & histology*; D014070:Tooth / Q000033:anatomy & histology*; D014907:Whales / Q000033:anatomy & histology