Ivory is a hard, white material from the tusks (traditionally from elephants) and teeth of animals, that consists mainly of dentine, one of the physical structures of teeth and tusks. The chemical structure of the teeth and tusks of mammals is the same, regardless of the species of origin, but ivory contains structures of mineralised collagen. [1]

2025年3月5日 · ivory, variety of dentin of which the tusk of the elephant is composed and which is prized for its beauty, durability, and suitability for carving. The tusk is the upper incisor and continues to grow throughout the lifetime of male and female African elephants and of the male Indian elephant; the female Indian elephant has no tusks or small ones.

2024年6月4日 · Ivory is made of dense bone tissue that surrounds enamel. More specifically, it is a form of dentin, which is the hard material that makes up the bulk of teeth. Unlike antlers that are shed annually, tusks evolved from upper incisor teeth and continually grow over the course of the animal’s lifetime.

Ivory is the hard, white material from the tusks and teeth of elephants, hippopotami, walruses, warthogs, sperm whales and narwhals, as well as now extinct mammoths and mastodons. This resource focuses specifically on elephant ivory, which is the most popular and highly valued of …

Ivory is a hard, white material derived from the tusks and teeth of elephants. It has been used for centuries to create jewelry and other works of art, as well as religious artifacts, musical …

The meaning of IVORY is the hard creamy-white modified dentine that composes the tusks of a tusked mammal (such as an elephant, walrus, or narwhal). How to use ivory in a sentence.

Eating small prey means consuming a lot of fur, feathers and difficult-to-digest tissues. These are called “animal fiber,” explains Mike Maslanka, head of nutrition sciences at the National Zoo,...

Understanding what ivory is and how it has been used can deepen your appreciation for this unique material and raise awareness about its ethical implications today. Ivory predominantly comprises dentin, a bone-like material that makes up the structure of teeth and tusks.

IVORY definition: 1. the hard yellowish-white substance that forms the tusks of some animals such as elephants, used…. Learn more.

Ivory, which varies from translucent to opaque, is produced by the following animals: The finest and most beautiful ivory, which is known as green ivory, is from the vicinity of Pangani, in Tanganyika Territory. The type called cape ivory is softer, sometimes yellowish, and occasionally a "dead white" color.