tusk

A huge tusk decorated the wall of his study.

I wonder how much elephant tusk, rhino horn or a stuffed lion will cost when they vanish.

That hole is now being filled - thanks to narwhals, medium-size whales, endemic to the Arctic, known as unicorns of the seas because of the single, spiralling tusk found in males.

First find the key to the museum, then get the mammoth tusk from the natural history wing.

The elephant's tusk is very long.