the skeleton of any zoophyte, esp that of a coral colony
Examples of 'corallum' in a sentence
corallum
This species has a triangular arm shaped corallum with the mouth extending along all three arms.
T. Mondal, C. Raghunathan 2013, 'Description of a new coral species Ctenactis triangular is (Scleractinia: Fungiidae)from Andaman Islands, India', Journal of Threatened Taxahttp://threatenedtaxa.org/index.php/JoTT/article/view/1039. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)