Definition of ophiuroid in English:


Pronunciation /äfiˈyo͝oroid/ /ɑfɪˈjʊrɔɪd/


  • An echinoderm of the class Ophiuroidea, which comprises the brittlestars.

    ‘Hans perhaps is best known for his work on crinoids and ophiuroids, but he has many titles on asteroids, echinoids, and holothurians as well.’
    • ‘Unlike the situation with gastropods, sublethal damage is relatively easy to interpret in ophiuroids and crinoids.’
    • ‘Some, like many starfish, are predators; holothurians, sand dollars, and ophiuroids often feed on detritus; crinoids are filter-feeders; sea urchins scrape algae from rocks.’
    • ‘Clearly, the late Eocene ophiuroids and crinoids experienced little physical damage and limited predation pressure.’
    • ‘Furthermore, physical damage was not an important cause of arm injury when the ophiuroids and crinoids were alive in the late Eocene.’


  • Relating to or denoting ophiuroids.

    ‘Alternative phylogenetic trees were compared excluding the ophiuroid data set.’
    • ‘A few ophiuroid species can even tolerate brackish water, an ability otherwise almost unknown among echinoderms.’
    • ‘However, the placement of the ophiuroid branch with respect to the other echinoderms is still unresolved.’
    • ‘The restriction of dense ophiuroid populations in coastal waters during the Mesozoic is an aspect of the onshore-offshore trend.’
    • ‘Regardless of the distribution of rock outcrops, however, all stalked crinoids and most dense ophiuroid populations now live only in deep, offshore habitats.’