blas·toid
| \ ˈblaˌstȯid \
plural -s
Definition of blastoid
(Entry 1 of 2)
: an echinoderm or fossil of the class Blastoidea
blastoid
adjective
\ " \
Definition of blastoid (Entry 2 of 2)
: of, relating to, or like the Blastoidea
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Merriam-Webster unabridged
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