Definitions
from The Century Dictionary.
- Having the characters of or pertaining to the Blastoidea: as, a blastoid crinoid.
- noun An echinoderm of the group Blastoidea.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Zoöl.) One of the Blastoidea.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun zoology One of the Blastoidea.
Etymologies
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Examples
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Later Paleozoic seas were dominated by crinoid and blastoid echinoderms, articulate brachiopods, graptolites, and tabulate and rugose corals.
Paleozoic 2009
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The Permian extinction, 244 million years ago, devastated the marine biota: tabulate and rugose corals, blastoid echinoderms, graptolites, and most crinoids died out, as did the last of the trilobites.
Paleozoic 2009
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The blastoid is stemmed and armless, and its globular "head" or
The Elements of Geology William Harmon Norton 1900
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