| 单词 | radial canal | 
| 释义 | radial canalnoun1    : one of the numerous minute canals lined with choanocytes which radiate from the paragastric cavity in some sponges and end just below the surface of the sponge   2    : one of the canals extending through the substance of the umbrella from the gastric cavity to the marginal circular canal in jellyfishes   3    : a tube extending outward along each ambulacral area from the circumoral canal in most echinoderms    | 
	
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