Longsword
A longsword is a common sword larger than a short sword or dagger but still shorter than a greatsword. A longsword usually is a single-handed weapon, though some variants are two-handed swords, or swords that can be used as a one-handed or a two-handed weapon - these are known as bastard swords. The elven "hand-and-a-half" longsword was called Megil.
In Middle-earth longswords were used by the Easterlings, for example the Asdriag, Odhriag, and Sagath; the Black Númenóreans; the Dorwinrim; the Rohirrim; and some half-elves.