The cavity within a bract (bract, n. 2) of a hydrozoan.
单词 | θ32089 |
释义 | the world > animals > invertebrates > subkingdom Metazoa > grade Diploblastica > phylum Coelenterata > [noun] > class Hydrozoa > member of > zooid > protective > cyst or cavity in (1) phyllocyst1859 The cavity within a bract (bract, n. 2) of a hydrozoan. |
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