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heart urchin
noun
- an echinoderm of the order Spatangoida, having an elongate, somewhat heart-shaped outer covering.
heart urchin
noun
- any echinoderm of the genus Echinocardium, having a heart-shaped body enclosed in a rigid spiny test: class Echinoidea (sea urchins)
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Word History and Origins
Origin of heart urchin1
First recorded in 1835–45
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Example Sentences
A very large heart-urchin, found on the southern coast of Florida and in the West Indies in shallow water.
From Project Gutenberg
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