"Hydrotheca" Natural Recordings by Native Speakers
Hydrotheca refers to the shell or covering of a rhizocephalan sea parasite, particularly the genus Sacculina, which is a type of barnacle. It is a hard, calcareous structure that forms around the parasite's body and is used for protection and attachment.
Hydrotellurate is a type of mineral compound, specifically a hydrated tellurite. A tellurite is a compound of tellurium (Te) with a higher oxidation state, and adding "hydrate" indicates that it has water molecules (H2O) combined with the tellurite.