WordReference Random House Unabridged Dictionary of American English © 2017
bal•lis•ta  (bə listə),USA pronunciation n., pl.  -tae (-tē).USA pronunciation 
  1. Militaryan ancient military engine for throwing stones or other missiles.
  • Greek *ballistá̄s, dialect, dialectal variant of *ballisté̄s, equivalent. to báll(ein) to throw + -istēs -ist
  • Latin, probably
  • 1590–1600

Collins Concise English Dictionary © HarperCollins Publishers::

ballista /bəˈlɪstə/ n ( pl -tae / -tiː/)
  1. an ancient catapult for hurling stones, etc
Etymology: 16th Century: from Latin, ultimately from Greek ballein to throw

'ballista' also found in these entries:

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