tar·​di·​grade | \ ˈtär-də-ˌgrād How to pronounce tardigrade (audio) \

Definition of tardigrade

: any of a phylum (Tardigrada) of microscopic invertebrates with four pairs of stout legs that live usually in water or damp moss

called also water bear

Examples of tardigrade in a Sentence

Recent Examples on the Web The squid tissue will be frozen on the station and returned to Earth later, preserving the molecular timeline of which genes turned off and on for the squid, similar to the tardigrade experiment. Ashley Strickland, CNN, 26 May 2021 Mosses which house many microscopic organisms, including the famous tardigrade, or water bear. Deboki Chakravarti, Scientific American, 13 Aug. 2021 However, some parts of a meteorite impacting Earth or Mars would experience lower shock pressures that a tardigrade could live through, Traspas says. Jonathan O'callaghan, Science | AAAS, 18 May 2021 Like the more charismatic tardigrade, bdelloid rotifers are extremophiles—organisms that can withstand astonishing conditions like red-hot undersea vents or the vacuum of space. Caroline Delbert, Popular Mechanics, 28 June 2021 Researchers are also looking at how different environmental conditions could affect tardigrade gene expression. Catherine Thorbecke, ABC News, 3 June 2021 The researchers loaded two or three individuals of Hypsibius dujardini, a species of freshwater tardigrade, each into a number of nylon bullets, which were frozen to induce the creatures' hibernation state. David Bressan, Forbes, 19 May 2021 The other tardigrade died within 24 hours of exposure. Megan Marples, CNN, 19 Oct. 2020 The tardigrade found to have this trait is called the Paramacrobiotus BLR strain. Megan Marples, CNN, 19 Oct. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'tardigrade.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of tardigrade

1860, in the meaning defined above

History and Etymology for tardigrade

ultimately from Latin tardigradus slow-moving, from tardus slow + gradi to step, go — more at grade entry 1

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The first known use of tardigrade was in 1860

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Last Updated

3 Sep 2021

Cite this Entry

“Tardigrade.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tardigrade. Accessed 18 Oct. 2021.

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More from Merriam-Webster on tardigrade

Britannica.com: Encyclopedia article about tardigrade


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