an·​ky·​lo·​sau·​rus ˌaŋ-kə-lō-ˈsȯr-əs How to pronounce ankylosaurus (audio)
: any of a North American genus (Ankylosaurus) of large ankylosaurs having a bony club at the end of the tail

Examples of ankylosaurus in a Sentence

Recent Examples on the Web The species belongs to the thyreophoran group, which includes other, more famous, juggernauts such as stegosaurus and ankylosaurus. Sean Mowbray, Discover Magazine, 13 Oct. 2022 There’s the tank-like ankylosaurus crushing opponents with its wrecking-ball tail. Cody Cassidy, Wired, 9 Apr. 2021 The ankylosaurus was not the only prehistoric beast to have an intimidating backside. Nicholas St. Fleur, New York Times, 16 Jan. 2018 And the bat and club were iconic features seen in both ankylosaurus and the glyptodons, which were ancient boulder-sized armadillos. Nicholas St. Fleur, New York Times, 16 Jan. 2018

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'ankylosaurus.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


borrowed from New Latin, from Greek ankýlos "bent, crooked, curved" + -saurus -saurus — more at angle entry 3

Note: The genus name was introduced by the American paleontologist Barnum Brown (1872-1963) in "The Ankylosauridæ, a new family of armored dinosaurs from the Upper Cretaceous," Bulletin of the American Museum of Natural History, vol. 24 (1908), pp. 187-201. Brown provides no explanation of the name. It is possible that ankylo- alludes not to the literal meaning of the Greek word, but rather to the medical term ankylosis in the sense "fusion of bones," given that one of what Brown considered "striking features" of the animal is that "posterior ribs [are] coössified to vertebræ."

First Known Use

1907, in the meaning defined above

Time Traveler
The first known use of ankylosaurus was in 1907

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Cite this Entry

“Ankylosaurus.” Dictionary, Merriam-Webster, Accessed 23 Apr. 2024.

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