n.; pl. Ivories [ OE. ivori, F. ivoire, fr. L. eboreus made of ivory, fr. ebur, eboris, ivory, cf. Skr. ibha elephant. Cf. Eburnean. ] [ 1913 Webster ]

1. The hard, white, opaque, fine-grained substance constituting the tusks of the elephant. It is a variety of dentine, characterized by the minuteness and close arrangement of the tubes, as also by their double flexure. It is used in manufacturing articles of ornament or utility. [ 1913 Webster ]

☞ Ivory is the name commercially given not only to the substance constituting the tusks of the elephant, but also to that of the tusks of the hippopotamus and walrus, the hornlike tusk of the narwhal, etc. [ 1913 Webster ]

2. The tusks themselves of the elephant, etc. [ 1913 Webster ]

3. Any carving executed in ivory. Mollett. [ 1913 Webster ]

4. pl. Teeth; as, to show one's ivories. [ Slang ] [ 1913 Webster ]

Ivory black. See under Black, n. --
Ivory gull (Zool.), a white Arctic gull (Larus eburneus). --
Ivory nut (Bot.), the nut of a species of palm, the Phytephas macroarpa, often as large as a hen's egg. When young the seed contains a fluid, which gradually hardness into a whitish, close-grained, albuminous substance, resembling the finest ivory in texture and color, whence it is called vegetable ivory. It is wrought into various articles, as buttons, chessmen, etc. The palm is found in New Grenada. A smaller kind is the fruit of the Phytephas microarpa. The nuts are known in commerce as Corosso nuts. --
Ivory palm (Bot.), the palm tree which produces ivory nuts. --
Ivory shell (Zool.), any species of Eburna, a genus of marine gastropod shells, having a smooth surface, usually white with red or brown spots. --
Vegetable ivory, the meat of the ivory nut. See Ivory nut (above). [ 1913 Webster ]

n. (Zool.) A large, handsome, black-and-white North American woodpecker (Campephilus principalis), having a large, sharp, ivory-colored beak. Its general color is glossy black, with white secondaries, and a white dorsal stripe. The male has a large, scarlet crest. It is now rare, and found only in the Gulf States and Cuba.
Syn. -- ivory-billed woodpecker, Campephilus principalis. [ 1913 Webster ]

n. (Photog.) A picture produced by superposing a very light print, rendered translucent by varnish, and tinted upon the back, upon a stronger print, so as to give the effect of a photograph in natural colors; -- called also hellenotype. Knight. [ 1913 Webster ]