Narwal n. : See Narwhal.

Example:
About how long is the average horn of a Narwal? you know what i mean?

Taxonomy
narwhal, tusk, narwhal tusk, Monodon monoceros, whales, Jørgensen, species, Heide, Narwhal class submarine, dives, Greenland, Narwhal Whales, horn, free encyclopedia, populations, diet, depths, weigh.

Defination from the web:
Narwal) Jump to: navigation, search. This article is about the species of whale. ... In 1555, Olaus Magnus published a drawing of a fish-like creature with a horn on its forehead, correctly identifying it as a "Narwal".[17] ...