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noun:- The hollow stem of a hydroid, either quick or branched.
- The hollow stem of a hydroid, either simple or branched. See Illust. of gymnoblastea and hydroidea.
- In zoology, the primary stem associated with cœnosare of a hydrozoan.
- The atheciferous stem of hydroid corals: often put on the filiform procedure wherein the sicula regarding the graptolite is suspended.
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- Definition for "hydrocaulus"
- The hollow stem of a hydroid, either quick…
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- Variant for "hydrocaulus"
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