: any of a large class (Crinoidea) of echinoderms usually having a somewhat cup-shaped body with five or more feathery arms compare feather star, sea lily
crinoidadjective
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These aquatic, plant-like animals related to sea stars and sea urchins are formally called crinoids.—Margherita Bassi, Smithsonian Magazine, 30 Jan. 2025 Both crinoids and moss animals would be common in that area at the bottom of the sea at the time.—James Doubek, NPR, 29 Jan. 2025 The same fossil bed yielded ancient sponges, crinoids, and ammonite coprolites and beaks.—Isaac Schultz / Gizmodo, Quartz, 18 May 2024 The walls of the waste basket are lined with crinoids, plant-like marine animals that have been around since the Paleozoic.—Carlyn Kranking, Smithsonian Magazine, 16 Mar. 2023 Scientists initially estimated that crinoids floated for a few years.—Raleigh McElvery, Smithsonian, 12 Aug. 2019 Along the way, keep an eye out for crinoid and other marine fossils.—Steve Larese, National Geographic, 27 June 2019 The warm coastal waters surrounding Gondwana were perfect for new kinds of animals, like brachiopods, crinoids, ostracodes, cephalopods, corals, and bryozoans.—Annalee Newitz, Ars Technica, 21 Nov. 2017 Then check out this intriguing video from National Geographic of a feather star, a variety of crinoid that lives in the ocean.—Staff, The Christian Science Monitor, 28 July 2017
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