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.
Sorry, no etymologies found.
Later Paleozoic seas were dominated by crinoid and blastoid echinoderms, articulate brachiopods, graptolites, and tabulate and rugose corals.
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.
The blastoid is stemmed and armless, and its globular "head" or
The Elements of Geology William Harmon Norton 1900