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Definition of Calcareous sponge
1. Noun. (biology) Many sponges, of the class ''Calcarea'', having skeletons composed of spicules of calcium carbonate ¹
¹ Source: wiktionary.com
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1. Noun. (biology) Many sponges, of the class ''Calcarea'', having skeletons composed of spicules of calcium carbonate ¹
¹ Source: wiktionary.com