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Definition of
echinoidea
English to English
noun
sea urchins and sand dollars
source: WordNet 3.0
The class Echinodermata which includes the sea urchins. They have a calcareous shell, usually more or less spheroidal or disk-shaped, composed of many united plates, and covered with movable spines. See
Spatangoid
,
Clypeastroid
.
source: Webster 1913
Visual Synonyms
Nearby Word
echinoidea
,
echinoid
,
echinid
,
echinite
,
echinate
,
echeneididae
,
eschynite
,
euganoidei
,
exscind
,
eskinita
,
exacinate
,
essonite
,
exundate
,
examinant
,
examinate
,
euosmitte
,
exinanite
,
eschewment
,
equisonant
,
eyesaint
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