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Use "onagers" in a sentence
"The catapults were likewise called onagers, after the wild asses which fling up stones with their feet, and the ballistas scorpions, on account of a hook which stood upon the tablet, and being lowered by a blow of the fist, released the spring."
"Before the 20th century the region was home to several different species of gazelle, wild asses, hartebeests, oryxes, ibexes, dorcas and onagers."
"Related genera, such as the asses and onagers, are grouped together into "families" -- in this case, the Family Equidae."