Dictionary.com
Thesaurus.com

testudo

American  
[te-stoo-doh, -styoo-] / tɛˈstu doʊ, -ˈstyu- /

noun

plural

testudines
  1. (among the ancient Romans) a movable shelter with a strong and usually fireproof arched roof, used for protection of soldiers in siege operations.

  2. a shelter formed by overlapping oblong shields, held by soldiers above their heads.


testudo British  
/ tɛˈstjuːdəʊ /

noun

  1. a form of shelter used by the ancient Roman Army for protection against attack from above, consisting either of a mobile arched structure or of overlapping shields held by the soldiers over their heads

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of testudo

1350–1400 for earlier sense “tumor”; 1600–10 testudo for def. 1; Middle English < Latin testūdō tortoise, tortoise shell, siege engine; akin to test 2

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The Roman military formation called the "testudo" — Latin for "tortoise" — was supposedly inspired by this well-protected animal.

From The Verge

But I had no spare cash to lay out on stock, either in pigments or specimens of the genus testudo.

From Project Gutenberg

Wooden towers were brought to bear upon the battlements; a testudo of shields was used as cover for the men who undermined the walls; but Ez-Zegry was still unsubdued.

From Project Gutenberg

Terms relating to War.—Thus notice:— pilum, the distinctively Roman infantry weapon, and see a good illustration. phalanx; cf. the Roman testudo. tertiam aciem—i.e. the line of reserves, kept for just such emergencies.

From Project Gutenberg

Baguian is famed throughout those seas as a rookery for the giant tortoise—testudo elephantopus.

From Project Gutenberg