Canadian Medical Guide > Organisms > Animals > Invertebrates > Echinodermata > Sea Urchins Terms and Definitions
Sea Urchins
Medical Definition: | Somewhat flattened, globular echinoderms of the class Echinoidea, having thin, brittle shells of calcareous plates. |
Guide Notes: | sea urchin eggs = OVUM (IM) + SEA URCHINS (NIM) if merely test organism |
Also Called: | Sand-Dollar |
Previously Indexed: | Echinodermata (1966-1971) |
Sea Urchins Medical Definitions and Terms
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