Definition of narwhal
: an arctic cetacean (Monodon monoceros) about 20 feet (6 meters) long with the male having a long twisted ivory tusk
Variants of narwhal
Origin of narwhal
Norwegian & Dan narhval & Swedish narval, probably modification of Icelandic nárhvalur, from Old Norse nāhvalr, from nār corpse + hvalr whale; from its color
First Known Use: 1646
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