The falx was a weapon with a curved blade that was sharp on the inside edge used by the Thracians and Dacians. The name was later applied to a siege hook used by the Romans.
Dacian warriors wielding a two-handed falx on the Tropaeum Traiani
Dacian weaponry including a falx (top) exhibited in Cluj National History Museum
A falx (romphaia) wielded on the Tropaeum Traiani
Another image from the Tropaeum Traiani
A sickle, bagging hook, reaping-hook or grasshook is a single-handed agricultural tool designed with variously curved blades and typically used for harvesting or reaping grain crops, or cutting succul
Nepalese sickle from Panchkhal
One of 12 roundels depicting the "Labours of the Months" (1450–1475)
A very early sickle, c. 7000 BC, flint and resin, Tahunian culture, Nahal Hemar cave, now in the Israel Museum.