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1. A wild ass (Equus hemionus) of Asia, having an erect mane, a light brown coat, and a dark stripe along the back.
2. An ancient and medieval catapult, often employing a wooden arm with a short sling.

[Middle English, from Late Latin, from Latin, wild ass, from Greek onagros : onos, ass; see asinine + agrios, wild; see agro- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n, pl -gri (-ˌɡraɪ) or -gers
1. (Animals) a Persian variety of the wild ass, Equus hemionus. Compare kiang
2. (Firearms, Gunnery, Ordnance & Artillery) an ancient war engine for hurling stones
[C14: from Late Latin: military engine for stone throwing, from Latin: wild ass, from Greek onagros, from onos ass + agros field]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈɒn ə dʒər)

n., pl. -gers, -gri (-ˌgraɪ)
1. a wild ass, Equus hemionus, of SW Asia.
2. a military catapult used in ancient and medieval times for throwing stones.
[1300–50; Middle English < Late Latin: machine for throwing projectiles, Latin wild ass < Greek ónagros (in both senses), alter. of ónos ágrios ass of the fields, wild ass (see acre)]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.onager - an engine that provided medieval artillery used during siegesonager - an engine that provided medieval artillery used during sieges; a heavy war engine for hurling large stones and other missiles
engine - an instrument or machine that is used in warfare, such as a battering ram, catapult, artillery piece, etc.; "medieval engines of war"
2.onager - Asiatic wild assonager - Asiatic wild ass      
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
WHAT type of creature is an onager? WHERE is Ipswich the administrative centre?
What sort of creature is an onager? A Afish B An insect C Awildass D Adog 5.
Reproductive phase tended to be negatively related to post-reproductive phase in kulan and onager, and to birth rate within the reproductive phase in one out of four cases (plus two according tendencies).
Other animals include scimitar-horned oryx, addax, Arabian oryx, dama gazelle, Nubian ibex, wild goats, barbary sheep and Asiatic onager.
Arabian species include scimitar-horned oryx, addax, Arabian oryx, dama gazelle, Nubian ibex, wild goat, barbary sheep and Asiatic onager.
The donkey is really the "wild onager" or "Arabian onager," again a wild creature.
BECOME a Roman for the day and build and fire your own catapult - known in the legion as an onager - at Canterbury's Roman Museum.
A Persian onager was born this month in Virginia, one of he few onagers to be born in captivity or in Iran, where they are endangered.
The tension/torsion model was a derivative of a machine employed by the Greeks and Romans, called variously an "onager" and a "mangonel," continuously used throughout the Middle Ages.
Jack, who was at home with wife Hilda, 86, finally found the answer, "onager", by changing his search to "donkey sanctuaries".
Xenophon's observations were precisely confirmed over 22 centuries later: "It is said the Onager can not be caught by a single horseman in the open.
Genetic relatedness and pathogenicity of equine herpesvirus 1 isolated from onager, zebra and gazelle.