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1
English
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1.1
Noun
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helicoplacoid
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From Wiktionary, the free dictionary
English
[
edit
]
Noun
[
edit
]
helicoplacoid
(
plural
helicoplacoids
)
Any extinct
echinoderm
of the class
Helicoplacoidea
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en:Echinoderms
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helicoplacoid
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