n.

a hard smooth ivory colored dentine that makes up most of the tusks of elephants and walruses

同義詞：ivory

a long pointed tooth specialized for fighting or digging; especially in an elephant or walrus or hog

Horns, tusks & flippers: the evolution of hoofed mammals
Asian elephants with longer tusks have lower parasite loads
Development of tusks and associated structures in Mesoplodon bidens (Cetaceae, Mammalia) : Mammalia
The role of tusks, musth and body size in male–male competition among Asian elephants, Elephas maximus
A hypothesis on the homology of proboscidean tusks based on paleontological data
Walrus ethology. I. The social role of tusks and applications of multidimensional scaling
Oxygen isotope variation in the tusks of extinct proboscideans: A measure of season of death and seasonality
Growth increments in Gomphotherium tusks and implications for late Miocene climate change in North America
Testosterone and tusks: maturation and seasonal reproductive patterns of live, free-ranging male dugongs (Dugong dugon) in a subtrop...
Paleoclimatic implications of oxygen isotopic variation in late Pleistocene and Holocene tusks of Mammuthus primigenius from northe...