An enclosing horny or chitinous layer secreted by many colonial hydroids.
| 单词 | θ32097 |
| 释义 | the world > animals > invertebrates > subkingdom Metazoa > grade Diploblastica > phylum Coelenterata > [noun] > class Hydrozoa > member of > zooid > horny case of coenosarc (1) perisarc1870 An enclosing horny or chitinous layer secreted by many colonial hydroids. |
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