
ancient organic reef of moundlike form built by a variety of marine invertebrates, including corals, echinoderms, gastropods, mollusks, and others; ... [1 related articles]
Found on
http://www.britannica.com/eb/a-z/b/66

a structure of biological origin (e.g., coral reef).
Found on
http://www.encyclo.co.uk/local/20126

bioherm, biohermal 1. A reef, such as a coral reef, formed from organic material. 2. A mound-like accumulation of fossil remains on the site where organisms lived. 3. A mound, dome, or reef-like mass of rock that is composed almost exclusively of the remains of sedentary marine organisms; such as, corals, algae, mollusks, and other sedentary mari...
Found on
http://www.wordinfo.info/words/index/info/view_unit/2819/15

Mound of organic remains in a reef, also called areef knoll
Found on
https://www.encyclo.co.uk/local/20501

a carbonate rock formation, in the form of an ancient reef or hummock, consisting of the fossilized remains of corals, algae, mollusks, and other sedentary marine life, and commonly surrounded by rock of a different lithology.
Found on
https://www.infoplease.com/dictionary/bioherm
No exact match found.