The mesangylon (Greek: μεσάγκυλον) was a javelin with a strap (Greek: αγκύλη) for throwing it by. Its name is attested, among others, in the works of Euripides [1], Polybius [2] and Arrian. It is one of the weapons used in Alexander's experimental phalanx [3]
Perseus Greek Word Study Tool [1]