army ant

noun

: any of a subfamily (Dorylinae) of aggressive nomadic tropical ants that prey on insects and spiders

Examples of army ant in a Sentence

Recent Examples on the Web
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These renderings reveal different structures within the body of an army ant (Eciton hamatum) sub-soldier, based on Antscan data. IEEE Spectrum, 5 Mar. 2026 Five insanely strong men made a steady trek from truck to door like a trail of army ants, each one carrying an item three times his weight and size. Marni Jameson, Arkansas Online, 12 Dec. 2025 Marching army ants strictly following a pheromone trail to carry heavier loads are another known example. Rohini Subrahmanyam, Scientific American, 29 Sep. 2025 Every insect poses different challenges, but Cockerill told Ars that wrangling the army ants on location in the Costa Rican rainforest was probably the trickiest. Jennifer Ouellette, Ars Technica, 24 Jan. 2024 Muratore and her collaborators believe an army ant’s collaborative capabilities could soon help engineers program swarms of robots based on the insect’s behavior principles and brains. Andrew Paul, Popular Science, 22 Nov. 2023 Ultimately, the researchers say that the species is the second oldest army ant species to be identified, and the first (and only) to be identified in Europe, which was much warmer and wetter 35 million years ago. Sam Walters, Discover Magazine, 29 Nov. 2022

Word History

First Known Use

1863, in the meaning defined above

Time Traveler
The first known use of army ant was in 1863

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Cite this Entry

“Army ant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/army%20ant. Accessed 5 Jul. 2026.

Kids Definition

army ant

noun
: any of various ants that live in groups, move from place to place in search of food, are found from Mexico to South America, and feed especially on insects and spiders

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