- a small cannon for shooting harpoons.
Origin of harpoon gun
First recorded in 1810–20
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for harpoon gun
As respected the second mode, the use of the harpoon-gun, there was no novelty in that certainly.
This harpoon-gun is now used all over the world, and has made whaling a wonderfully profitable business.
Greener's harpoon-gun is a kind of wall-piece fixed in a crutch, which steps into the bow-bollard of the whale-boat.The Sailor's Word-Book
William Henry Smyth
Looking at Hank, he saw that the old fighter of the seas had dropped the harpoon-gun and was holding poised the long lance.The Boy With the U. S. Fisheries
They go out in large open boats, six men to a boat, and shoot the harpoon 220 into the whale from the harpoon-gun.Bancroft's Tourist's Guide Yosemite