hydrotheca
nounEtymology From hydro- + theca.
1
Biology, Natural sciences, Zoology One of the calyculi that protect the hydranths in certain hydrozoans.
- ovate hydrothecae
- saucer-shaped hydrothecae
3 more examples
- sessile hydrothecae
- rectangular hydrothecae
- tubular hydrothecae
- Derived terms
- hydrothecal