Blastoidea

plural noun Blas·toi·dea \ blaˈstȯidēə \

Definition of Blastoidea

:a class, formerly considered a division of Crinoidea, of extinct Paleozoic short-stemmed or stemless pelmatozoan echinoderms shaped somewhat like a flower bud and having five ambulacral areas with slender appendages along their margins and flattened tubes along their internal surface

blastoidean

adjective or noun

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Origin and Etymology of blastoidea

New Latin, from blast- + -oidea


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