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sarcosoma
sarcosoma n.
Brit. 
/ˌsɑːkə(ʊ)ˈsəʊmə/
, /ˌsɑːkə(ʊ)ˈsəʊmə/U.S. /ˌsɑrkəˈsoʊmə/
[Greek σῶμα body] the ‘bark’ of corals./ˌsɑrkəˈsoʊmə/Π
1865 Nat. Hist. Rev. 363 The sarcosoma or bark of the coral is next described [by Lacaze-Duthiers].
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