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Pronunciation varies by accent · noun
(zoology) Any echinoderm of the order Spatangoida, of heart urchins..
The enlarged rear interambulacrum on the oral side of holasteroids and spatangoids is known as the plastron.
Spatangoids constitute a monophyletic group of heart urchins that appears in the early Cretaceous (145 M.Y. ago) and ranges to the Recent.
Oval tests with specific ventral morphology for efficient burrowing allowed spatangoids to burrow deeply in sand to avoid gastropod predation.
Use spatangoid when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Spatangoid means (zoology) Any echinoderm of the order Spatangoida, of heart urchins..
Common synonyms include heart urchin.
The opposite depends on the specific sense.
The enlarged rear interambulacrum on the oral side of holasteroids and spatangoids is known as the plastron.
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