heart urchin


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Related to heart urchin: sea star

heart urchin

n
(Animals) any echinoderm of the genus Echinocardium, having a heart-shaped body enclosed in a rigid spiny test: class Echinoidea (sea urchins)
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.heart urchin - sea urchin having a heart-shaped body in a rigid spiny shell
sea urchin - shallow-water echinoderms having soft bodies enclosed in thin spiny globular shells
order Spatangoida, Spatangoida - heart-shaped sea urchins
References in periodicals archive ?
Cultivation of the heart urchin Echinocardium cordatum and validation of its use in marine toxicity testing for environmental risk assessment.
The most abundant benthic macroinvertebrates that we observed were sea whips and orange sea pens (Ptilosarcus gurneyi) at the two northern sites and sea whips and heart urchins (Brisaster spp.
Echinoids (sea urchins, heart urchins, and sand dollars), with their readily obtainable gametes, have long been model organisms for fertilization studies.