Re: What was that? Elvis weapon in LOTR movie.
It's very similar to the Greek Rhomphaia
Interestingly enough, a similar weapon appears in some 13th century illuminated manuscripts, most notably, the Maciejowski Bible, which is notable for its very accurate depictions of clothing, armour, military hardware, etc.
(The figure near the center, wearing the brown surcote, wielding the weapon two-handed.)
My attempts at finding a proper name for the weapon have never borne fruit. I do find it interesting to note that in medieval French, the word 'glaive' seems to have been used interchangeably to describe a pole arm or a sword.