arthropod

noun

ar·​thro·​pod ˈär-thrə-ˌpäd How to pronounce arthropod (audio)
: any of a phylum (Arthropoda) of invertebrate animals (such as insects, arachnids, and crustaceans) that have a segmented body and jointed appendages, a usually chitinous exoskeleton molted at intervals, and a dorsal anterior brain connected to a ventral chain of ganglia
arthropod adjective
arthropodan adjective

Examples of arthropod in a Sentence

Recent Examples on the Web Just before sunset, dozens of the crabs — which are not technically crabs but arthropods more closely related to spiders — started coming to shore. Benji Jones, Vox, 28 June 2024 Sea creatures went from being soft and flexible to something similar to modern-day arthropods, like crustaceans and centipedes, according to the study. Irene Wright, Miami Herald, 26 June 2024 But later, the USDA and Army produced a new, longer-lasting and gentler formula called extended duration topical insect/arthropod repellent (EDTIAR), which had no ethanol and contained just 33 percent DEET. Riis Williams, Scientific American, 24 June 2024 One example is a fossil specimen of the Cambrian arthropod Mollisonia, which showed brain organization comparable with that of living spiders, scorpions and horseshoe crabs, Mussini said. Mindy Weisberger, CNN, 24 June 2024 See all Example Sentences for arthropod 

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

Word History

Etymology

from base of New Latin Arthropoda, group name, from arthro- arthro- + -poda, neuter plural of Greek -podos -pod

Note: The taxon Arthropoda, "those with jointed limbs," was introduced by the German zoologist Karl Theodor Ernst von Siebold (1804-85) in Lehrbuch der vergleichenden Anatomie, von v. Siebold und Stannius [Hermann Friedrich Stannius], Erster Teil, Wirbellose Thiere, von C.Th. v. Siebold (Berlin, 1848), p. 4. Note that the first part of the Lehrbuch was published after the second part, released in 1846, an irregularity that has resulted in Arthropoda being incorrectly dated to that year, and credited to both Stannius and von Siebold. See the discussion in Thomas A. Hegna, et al., "The correct authorship of the taxon name 'Arthropoda'," Arthropod Systematics and Phylogeny, vol. 71, no. 2 (November 19, 2013), pp. 71-74.

First Known Use

1857, in the meaning defined above

Time Traveler
The first known use of arthropod was in 1857

Dictionary Entries Near arthropod

Cite this Entry

“Arthropod.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/arthropod. Accessed 15 Jul. 2024.

Kids Definition

arthropod

noun
ar·​thro·​pod ˈär-thrə-ˌpäd How to pronounce arthropod (audio)
: any of a phylum of invertebrate animals (as insects, arachnids, and crustaceans) having a segmented body, jointed limbs, and a shell of chitin that is shed periodically
arthropod adjective

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