echi·​no·​derm | \ i-ˈkī-nə-ˌdərm \

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 \ adjective

Examples of echinoderm in a Sentence

Recent Examples on the Web

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 Congresswoman Pingree, whose past voting record falls firmly on the side of environmental and wildlife protections, is an unlikely champion for an exemption to echinoderm inspections. National Geographic, "Why Smuggling of This Ocean Creature May Skyrocket," 2 June 2017 Sea cucumbers, which are shaped like cucumbers with small feet and measure up to six feet (1.8 meters), are echinoderms, a family that includes starfish and sea urchin. Elliot Spagat, The Denver Post, "Charges shed light on sea cucumber smuggling at U.S. border," 20 May 2017 The common sea star (Asterias forbesi) is an echinoderm related to sea urchins and sea cucumbers. Dave Taft, New York Times, "Sea Stars Are More Brutal Than They Look," 23 Aug. 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

The first known use of echinoderm was in 1835

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Rhyming Dictionary: Words that rhyme with echinoderm Encyclopedia article about echinoderm

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