Claymore

From Memory Alpha, the free Star Trek reference.

A Claymore was a Scottish sword.

In 2268, Chief Engineer Montgomery Scott was dazzled by a claymore when all the weapons in the Enterprise's armory were replaced by antique weaponry. (TOS: "Day of the Dove")

Mr. Scott was apparently wielding the latter basket-hilted claymore design of Scottish soldiers, as opposed to the earlier and more famous two-handed claymore of Scottish highlanders.