Zoology. A kind of sheath about the base of the thread-cells of acalephs.
| 单词 | θ32053 |
| 释义 | the world > animals > invertebrates > subkingdom Metazoa > grade Diploblastica > phylum Coelenterata > [noun] > member of > parts of > sheath around base (1) involucrum1877 Zoology. A kind of sheath about the base of the thread-cells of acalephs. |
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