arthropod

[ahr-thruh-pod]
noun
1.
any invertebrate of the phylum Arthropoda, having a segmented body, jointed limbs, and usually a chitinous shell that undergoes moltings, including the insects, spiders and other arachnids, crustaceans, and myriapods.
adjective
2.
Also, arthropodal [ahr-throp-uh-dl] , arthropodan [ahr-throp-uh-dn] , arthropodous [ahr-throp-uh-duhs] . belonging or pertaining to the Arthropoda.

Origin:
1875–80; < Neo-Latin Arthropoda; see arthro-, -pod

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
arthropod (ˈɑːθrəˌpɒd)
 
n
any invertebrate of the phylum Arthropoda, having jointed limbs, a segmented body, and an exoskeleton made of chitin. The group includes the crustaceans, insects, arachnids, and centipedes
 
[C19 from NL, from Gk arthron joint + podus footed, from pous foot]
 
arthropodous
 
adj
 
ar'thropodal
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

arthropod
1877, from Mod.L. Arthropoda, lit. "those with jointed feet," biological classification of the phylum of segmented, legged invertebrates; see Arthropoda.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

arthropod ar·thro·pod (är'thrə-pŏd')
n.
Any of numerous invertebrate animals of the phylum Arthropoda, including insects, crustaceans, arachnids, and myriapods.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
arthropod   (är'thrə-pŏd')  Pronunciation Key 
Any of numerous invertebrate animals of the phylum Arthopoda, characterized by an exoskeleton made of chitin and a segmented body with pairs of jointed appendages. Arthropods share many features with annelids and may have evolved from them in the Precambrian Era. Arthropods include the insects, crustaceans, arachnids, myriapods, and extinct trilobites, and are the largest phylum in the animal kingdom.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary
arthropods [(ahr-thruh-podz)]

A phylum, or major division of the animal kingdom. Arthropods are animals with jointed legs and segmented bodies, such as insects, spiders, centipedes, and crustaceans. There are more species of arthropods than of any other animal phylum.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
It can expand the range of insects and arthropods that can transmit disease.
These hardy, adaptable arthropods have been around for hundreds of millions of
  years, and they are nothing if not survivors.
Oddly, toxicity of these substances is only quoted for arthropods, two of them:
  silverfish and shrimp.
The role played by these predatory arthropods in biological control of cereal
  aphids in winter wheat has yet to be determined.
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