(invertebrate zoology) Cup-shaped portion of the perisarc in some cnidarians that serves to hold and protect a withdrawn hydranth.
hydrotheca
| Sci-Tech Dictionary: hydrotheca |
(′hī·drō′thē·kə)
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 | Leptomedusae (invertebrate zoology) |
| hydrotheca |
| Aequorea victoria |
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