A sibyna was a type of spear used for hunting or warfare (see boar spears) in ancient times.
A long heavy spear the Illyrians used was described by the poet Ennius according to Festius. Hesychius of Alexandria, (5th century) calls it similar to a spear. Suda lexicon (10th century) calls it a Roman javelin.
The word may be Illyrian or Thraco- Phrygian.