The scythe sword was a type of single-edged sword

Single-edged sword

A single-edged sword may be any single-edged bladed weapon with a hilt which is longer than a knife but shorter than a polearm.*backsword*sabre*scimitar*Japanese sword*Dao *Messer*Kopis*Falx*Falcata*Falchion*Scythe sword...

 of the German Renaissance

German Renaissance

The German Renaissance, part of the Northern Renaissance, was a cultural and artistic movement that spread among German thinkers in the 15th and 16th centuries, which originated from the Italian Renaissance in Italy...

, related to the Dussack

Dussack

A Dussack is a type of short, single-edged sword from Central and Eastern Europe ....

.
It consisted of the blade of a scythe

Scythe

A scythe is an agricultural hand tool for mowing grass, or reaping crops. It was largely replaced by horse-drawn and then tractor machinery, but is still used in some areas of Europe and Asia. The Grim Reaper is often depicted carrying or wielding a scythe...

 to which a sword hilt

Hilt

The hilt of a sword is its handle, consisting of a guard,grip and pommel. The guard may contain a crossguard or quillons. A ricasso may also be present, but this is rarely the case...

 was attached. Like the falx

Falx

Falx is a Latin word originally meaning sickle, but was later used to mean any of a number of tools that had a curved blade that was sharp on the inside edge such as a scythe...

or falcata

Falcata

The falcata is a type of sword typical of the pre-Roman Iberian Peninsula , similar to Greek kopis or Nepalese kukri.-Name:...

 of antiquity, it was thus a curved sword with the cutting edge on the inside (as opposed to the scimitar

Scimitar

A scimitar is a backsword or sabre with a curved blade, originating in Southwest Asia .The Arabic term saif translates to "sword" in general, but is normally taken to refer to the scimitar type of curved backsword in particular.The curved sword or "scimitar" was widespread throughout the Muslim...

 or sabre

Sabre

The sabre or saber is a kind of backsword that usually has a curved, single-edged blade and a rather large hand guard, covering the knuckles of the hand as well as the thumb and forefinger...

 type with the edge on the outside).

The only known surviving example of a true scythe sword (its blade being made from an actual scythe), is that of Thomas Müntzer (1489–1525), kept in the Historical Museum, Dresden

Dresden

Dresden is the capital city of the Free State of Saxony in Germany. It is situated in a valley on the River Elbe, near the Czech border. The Dresden conurbation is part of the Saxon Triangle metropolitan area....

.
This sword has a representation of a runic calendar

Runic calendar

A Runic calendar is a perpetual calendar based on the 19 year long Metonic cycle of the Moon. Runic calendars were written on parchment or carved onto staves of wood, bone, or horn. The oldest one known, and the only one from the Middle Ages, is the Nyköping staff, believed to date from the 13th...

incised on the blade.
Demmin (1893) notes the existence of other sword blades of the early 16th century bearing runic calendars, in Berlin, Vienna, Paris, Munich, Graz and Luxembourg.