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
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Nearby Word
echinoidea, echinoid, echinid, echinite, echinate, echeneididae, eschynite, euganoidei, exscind, eskinita, exacinate, essonite, exundate, examinate, exinanite, examinant, euosmitte, eschewment, equisonant, eyesaint
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