echi·​no·​derm | \ i-ˈkī-nə-ˌdərm How to pronounce echinoderm (audio) \

Definition of echinoderm

: any of a phylum (Echinodermata) of radially symmetrical coelomate marine animals including the starfishes, sea urchins, and related forms

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Other Words from echinoderm

echinodermatous \ i-​ˌkī-​nə-​ˈdər-​mə-​təs How to pronounce echinoderm (audio) \ adjective

Examples of echinoderm in a Sentence

Recent Examples on the Web The footage of this pasta-looking echinoderm is actually pretty exciting because of a connection to food: Scientists got a first look at the creature eating. Rachel E. Greenspan, Time, "Let's Dive Into the Story of the 'Ravioli Starfish' That Looks Like a Stuffed-Pasta Shaped Wonder of the Sea," 11 July 2019 Ernst Haeckel’s intention was to make the natural forms of elusive organisms accessible to artists, and supply them with a new visual vocabulary of protists, mollusks, trilobites, siphonophores, fungi, and echinoderms. The New York Review of Books, "Lucy Jakub," 16 Dec. 2018 Bertrand Lefebvre of with the French National Center for Scientific Research (CNRS) and the Laboratoire de Géologie in Lyon, France, discovered that the millennia-old mystery animal is, in fact, an echinoderm—from the same family as a starfish. David Grossman, Popular Mechanics, "A 150-Year Old Weird Ancient Animal Mystery, Solved," 22 Feb. 2019 The first saw the emergence of brachiopods and molluscs, the second that of annelids, cnidarians, echinoderms and chordates (a group that includes the vertebrates). The Economist, "The Cambrian explosion was caused by a lack of oxygen, not an abundance," 7 June 2018 That is in contradistinction to Cambrian fossils, among which are found representatives of all the main animal groups (annelids, arthropods, brachiopods, chordates, cnidarians, echinoderms, molluscs and so on) that are around today. The Economist, "The Cambrian explosion was caused by a lack of oxygen, not an abundance," 7 June 2018 The lure of lucrative echinoderms may have proved too strong for three Southeast fishermen. Zaz Hollander, Anchorage Daily News, "Southeast Alaska fishermen illegally caught $35,000 worth of sea cucumbers, troopers say," 15 Mar. 2018 Feather stars are echinoderms, like the more familiar sea stars. National Geographic, "Mesmerizing Video Shows Swimming Feather Star," 9 Dec. 2016 Which has members of the indigenous community particularly worried about the fate of these strange echinoderms. Lorraine Boissoneault, Smithsonian, "Is the Mysterious Sea Cucumber Slipping Out of Our Grasp?," 4 Nov. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'echinoderm.' 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 echinoderm

1835, in the meaning defined above

History and Etymology for echinoderm

New Latin Echinodermata, phylum name, from echin- + -dermata (ultimately from Greek derma skin)

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Time Traveler for echinoderm

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The first known use of echinoderm was in 1835

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Cite this Entry

“Echinoderm.” Dictionary, Merriam-Webster, Accessed 8 May. 2021.

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